diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19bccd115..f1beb0cd0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 - Allow users to remove their emails if instance does not need email to register
+- Uploadfilter `Pleroma.Upload.Filter.Exiftool` has been renamed to `Pleroma.Upload.Filter.Exiftool.StripLocation`
 
 ### Added
 - `activeMonth` and `activeHalfyear` fields in NodeInfo usage.users object
@@ -30,6 +31,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Configuration: Add `birthday_required` and `birthday_min_age` settings to provide a way to require users to enter their birth date.
 - PleromaAPI: Add `GET /api/v1/pleroma/birthdays` API endpoint
 - Make backend-rendered pages translatable. This includes emails. Pages returned as a HTTP response are translated using the language specified in the `userLanguage` cookie, or the `Accept-Language` header. Emails are translated using the `language` field when registering. This language can be changed by `PATCH /api/v1/accounts/update_credentials` with the `language` field.
+- Uploadfilter `Pleroma.Upload.Filter.Exiftool.ReadDescription` returns description values to the FE so they can pre fill the image description field
 
 ### Fixed
 - Subscription(Bell) Notifications: Don't create from Pipeline Ingested replies
diff --git a/config/description.exs b/config/description.exs
index 704af8f68..7caad18b4 100644
--- a/config/description.exs
+++ b/config/description.exs
@@ -2726,7 +2726,7 @@
                 key: :versions,
                 type: {:list, :atom},
                 description: "List of TLS version to use",
-                suggestions: [:tlsv1, ":tlsv1.1", ":tlsv1.2"]
+                suggestions: [:tlsv1, ":tlsv1.1", ":tlsv1.2", ":tlsv1.3"]
               }
             ]
           }
diff --git a/docs/administration/CLI_tasks/instance.md b/docs/administration/CLI_tasks/instance.md
index 982b22bf3..88509cf5b 100644
--- a/docs/administration/CLI_tasks/instance.md
+++ b/docs/administration/CLI_tasks/instance.md
@@ -37,7 +37,8 @@ If any of the options are left unspecified, you will be prompted interactively.
 - `--static-dir <path>` - the directory custom public files should be read from (custom emojis, frontend bundle overrides, robots.txt, etc.)
 - `--listen-ip <ip>` - the ip the app should listen to, defaults to 127.0.0.1
 - `--listen-port <port>` - the port the app should listen to, defaults to 4000
-- `--strip-uploads <Y|N>` - use ExifTool to strip uploads of sensitive location data
+- `--strip-uploads-location <Y|N>` - use ExifTool to strip uploads of sensitive location data
+- `--read-uploads-description <Y|N>` - use ExifTool to read image descriptions from uploads
 - `--anonymize-uploads <Y|N>` - randomize uploaded filenames
 - `--dedupe-uploads <Y|N>` - store files based on their hash to reduce data storage requirements if duplicates are uploaded with different filenames
 - `--skip-release-env` - skip generation the release environment file
diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md
index 1e74d40e6..74642397b 100644
--- a/docs/configuration/cheatsheet.md
+++ b/docs/configuration/cheatsheet.md
@@ -627,12 +627,18 @@ This filter replaces the filename (not the path) of an upload. For complete obfu
 
 No specific configuration.
 
-#### Pleroma.Upload.Filter.Exiftool
+#### Pleroma.Upload.Filter.Exiftool.StripLocation
 
 This filter only strips the GPS and location metadata with Exiftool leaving color profiles and attributes intact.
 
 No specific configuration.
 
+#### Pleroma.Upload.Filter.Exiftool.ReadDescription
+
+This filter reads the ImageDescription and iptc:Caption-Abstract fields with Exiftool so clients can prefill the media description field.
+
+No specific configuration.
+
 #### Pleroma.Upload.Filter.Mogrify
 
 * `args`: List of actions for the `mogrify` command like `"strip"` or `["strip", "auto-orient", {"implode", "1"}]`.
diff --git a/docs/development/API/admin_api.md b/docs/development/API/admin_api.md
index f14081893..c46f83839 100644
--- a/docs/development/API/admin_api.md
+++ b/docs/development/API/admin_api.md
@@ -1636,3 +1636,117 @@ Returns the content of the document
   "error": "Could not install frontend"
 }
 ```
+
+## `GET /api/v1/pleroma/admin/announcements`
+
+### List announcements
+
+- Params: `offset`, `limit`
+
+- Response: JSON, list of announcements
+
+```json
+[
+  {
+    "id": "AHDp0GBdRn1EPN5HN2",
+    "content": "some content",
+    "starts_at": null,
+    "ends_at": null,
+    "all_day": false,
+    "published_at": "2022-03-09T02:13:05",
+    "reactions": [],
+    "statuses": [],
+    "tags": [],
+    "emojis": [],
+    "updated_at": "2022-03-09T02:13:05"
+  }
+]
+```
+
+Note that this differs from the Mastodon API variant: Mastodon API only returns *active* announcements, while this returns all.
+
+## `GET /api/v1/pleroma/admin/announcements/:id`
+
+### Display one announcement
+
+- Response: JSON, one announcement
+
+```json
+{
+  "id": "AHDp0GBdRn1EPN5HN2",
+  "content": "some content",
+  "starts_at": null,
+  "ends_at": null,
+  "all_day": false,
+  "published_at": "2022-03-09T02:13:05",
+  "reactions": [],
+  "statuses": [],
+  "tags": [],
+  "emojis": [],
+  "updated_at": "2022-03-09T02:13:05"
+}
+```
+
+## `POST /api/v1/pleroma/admin/announcements`
+
+### Create an announcement
+
+- Params:
+  - `content`: string, required, announcement content
+  - `starts_at`: datetime, optional, default to null, the time when the announcement will become active (displayed to users); if it is null, the announcement will be active immediately
+  - `ends_at`: datetime, optional, default to null, the time when the announcement will become inactive (no longer displayed to users); if it is null, the announcement will be active until an admin deletes it
+  - `all_day`: boolean, optional, default to false, tells the client whether to only display dates for `starts_at` and `ends_at`
+
+- Response: JSON, created announcement
+
+```json
+{
+  "id": "AHDp0GBdRn1EPN5HN2",
+  "content": "some content",
+  "starts_at": null,
+  "ends_at": null,
+  "all_day": false,
+  "published_at": "2022-03-09T02:13:05",
+  "reactions": [],
+  "statuses": [],
+  "tags": [],
+  "emojis": [],
+  "updated_at": "2022-03-09T02:13:05"
+}
+```
+
+## `PATCH /api/v1/pleroma/admin/announcements/:id`
+
+### Change an announcement
+
+- Params: same as `POST /api/v1/pleroma/admin/announcements`, except no param is required.
+
+- Updates the announcement according to params. Missing params are kept as-is.
+
+- Response: JSON, updated announcement
+
+```json
+{
+  "id": "AHDp0GBdRn1EPN5HN2",
+  "content": "some content",
+  "starts_at": null,
+  "ends_at": null,
+  "all_day": false,
+  "published_at": "2022-03-09T02:13:05",
+  "reactions": [],
+  "statuses": [],
+  "tags": [],
+  "emojis": [],
+  "updated_at": "2022-03-09T02:13:05"
+}
+```
+
+## `DELETE /api/v1/pleroma/admin/announcements/:id`
+
+### Delete an announcement
+
+- Response: JSON, empty object
+
+```json
+{}
+```
diff --git a/docs/installation/optional/media_graphics_packages.md b/docs/installation/optional/media_graphics_packages.md
index cb3d71188..de402d1c4 100644
--- a/docs/installation/optional/media_graphics_packages.md
+++ b/docs/installation/optional/media_graphics_packages.md
@@ -1,9 +1,9 @@
 # Optional software packages needed for specific functionality
 
 For specific Pleroma functionality (which is disabled by default) some or all of the below packages are required:
-  * `ImageMagic`
-  * `ffmpeg`
-  * `exiftool`
+    * `ImageMagic`
+    * `ffmpeg`
+    * `exiftool`
   
 Please refer to documentation in `docs/installation` on how to install them on specific OS.
   
@@ -14,19 +14,20 @@ Note: the packages are not required with the current default settings of Pleroma
 `ImageMagick` is a set of tools to create, edit, compose, or convert bitmap images.
 
 It is required for the following Pleroma features:
-  * `Pleroma.Upload.Filters.Mogrify`, `Pleroma.Upload.Filters.Mogrifun` upload filters (related config: `Plaroma.Upload/filters` in `config/config.exs`)
-  * Media preview proxy for still images (related config: `media_preview_proxy/enabled` in `config/config.exs`)
+    * `Pleroma.Upload.Filters.Mogrify`, `Pleroma.Upload.Filters.Mogrifun` upload filters (related config: `Plaroma.Upload/filters` in `config/config.exs`)
+    * Media preview proxy for still images (related config: `media_preview_proxy/enabled` in `config/config.exs`)
   
 ## `ffmpeg`
 
 `ffmpeg` is software to record, convert and stream audio and video.
 
 It is required for the following Pleroma features:
-  * Media preview proxy for videos (related config: `media_preview_proxy/enabled` in `config/config.exs`)
+    * Media preview proxy for videos (related config: `media_preview_proxy/enabled` in `config/config.exs`)
 
 ## `exiftool`
 
 `exiftool` is media files metadata reader/writer.
 
 It is required for the following Pleroma features:
-  * `Pleroma.Upload.Filters.Exiftool` upload filter (related config: `Plaroma.Upload/filters` in `config/config.exs`)
+    * `Pleroma.Upload.Filters.Exiftool.StripLocation` upload filter (related config: `Plaroma.Upload/filters` in `config/config.exs`)
+    * `Pleroma.Upload.Filters.Exiftool.ReadDescription` upload filter (related config: `Plaroma.Upload/filters` in `config/config.exs`)
diff --git a/lib/mix/tasks/pleroma/instance.ex b/lib/mix/tasks/pleroma/instance.ex
index f292fc762..5c93f19ff 100644
--- a/lib/mix/tasks/pleroma/instance.ex
+++ b/lib/mix/tasks/pleroma/instance.ex
@@ -34,7 +34,8 @@ def run(["gen" | rest]) do
           static_dir: :string,
           listen_ip: :string,
           listen_port: :string,
-          strip_uploads: :string,
+          strip_uploads_location: :string,
+          read_uploads_description: :string,
           anonymize_uploads: :string,
           dedupe_uploads: :string
         ],
@@ -161,7 +162,7 @@ def run(["gen" | rest]) do
         )
         |> Path.expand()
 
-      {strip_uploads_message, strip_uploads_default} =
+      {strip_uploads_location_message, strip_uploads_location_default} =
         if Pleroma.Utils.command_available?("exiftool") do
           {"Do you want to strip location (GPS) data from uploaded images? This requires exiftool, it was detected as installed. (y/n)",
            "y"}
@@ -170,12 +171,29 @@ def run(["gen" | rest]) do
            "n"}
         end
 
-      strip_uploads =
+      strip_uploads_location =
         get_option(
           options,
-          :strip_uploads,
-          strip_uploads_message,
-          strip_uploads_default
+          :strip_uploads_location,
+          strip_uploads_location_message,
+          strip_uploads_location_default
+        ) === "y"
+
+      {read_uploads_description_message, read_uploads_description_default} =
+        if Pleroma.Utils.command_available?("exiftool") do
+          {"Do you want to read data from uploaded files so clients can use it to prefill fields like image description? This requires exiftool, it was detected as installed. (y/n)",
+           "y"}
+        else
+          {"Do you want to read data from uploaded files so clients can use it to prefill fields like image description? This requires exiftool, it was detected as not installed, please install it if you answer yes. (y/n)",
+           "n"}
+        end
+
+      read_uploads_description =
+        get_option(
+          options,
+          :read_uploads_description,
+          read_uploads_description_message,
+          read_uploads_description_default
         ) === "y"
 
       anonymize_uploads =
@@ -229,7 +247,8 @@ def run(["gen" | rest]) do
           listen_port: listen_port,
           upload_filters:
             upload_filters(%{
-              strip: strip_uploads,
+              strip_location: strip_uploads_location,
+              read_description: read_uploads_description,
               anonymize: anonymize_uploads,
               dedupe: dedupe_uploads
             })
@@ -297,12 +316,19 @@ defp write_robots_txt(static_dir, indexable, template_dir) do
 
   defp upload_filters(filters) when is_map(filters) do
     enabled_filters =
-      if filters.strip do
-        [Pleroma.Upload.Filter.Exiftool]
+      if filters.strip_location do
+        [Pleroma.Upload.Filter.Exiftool.StripLocation]
       else
         []
       end
 
+    enabled_filters =
+      if filters.read_description do
+        enabled_filters ++ [Pleroma.Upload.Filter.Exiftool.ReadDescription]
+      else
+        enabled_filters
+      end
+
     enabled_filters =
       if filters.anonymize do
         enabled_filters ++ [Pleroma.Upload.Filter.AnonymizeFilename]
diff --git a/lib/pleroma/announcement.ex b/lib/pleroma/announcement.ex
new file mode 100644
index 000000000..d97c5e728
--- /dev/null
+++ b/lib/pleroma/announcement.ex
@@ -0,0 +1,160 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Announcement do
+  use Ecto.Schema
+
+  import Ecto.Changeset, only: [cast: 3, validate_required: 2]
+  import Ecto.Query
+
+  alias Pleroma.AnnouncementReadRelationship
+  alias Pleroma.Repo
+
+  @type t :: %__MODULE__{}
+  @primary_key {:id, FlakeId.Ecto.CompatType, autogenerate: true}
+
+  schema "announcements" do
+    field(:data, :map)
+    field(:starts_at, :utc_datetime)
+    field(:ends_at, :utc_datetime)
+    field(:rendered, :map)
+
+    timestamps(type: :utc_datetime)
+  end
+
+  def change(struct, params \\ %{}) do
+    struct
+    |> cast(validate_params(struct, params), [:data, :starts_at, :ends_at, :rendered])
+    |> validate_required([:data])
+  end
+
+  defp validate_params(struct, params) do
+    base_data =
+      %{
+        "content" => "",
+        "all_day" => false
+      }
+      |> Map.merge((struct && struct.data) || %{})
+
+    merged_data =
+      Map.merge(base_data, params.data)
+      |> Map.take(["content", "all_day"])
+
+    params
+    |> Map.merge(%{data: merged_data})
+    |> add_rendered_properties()
+  end
+
+  def add_rendered_properties(params) do
+    {content_html, _, _} =
+      Pleroma.Web.CommonAPI.Utils.format_input(params.data["content"], "text/plain",
+        mentions_format: :full
+      )
+
+    rendered = %{
+      "content" => content_html
+    }
+
+    params
+    |> Map.put(:rendered, rendered)
+  end
+
+  def add(params) do
+    changeset = change(%__MODULE__{}, params)
+
+    Repo.insert(changeset)
+  end
+
+  def update(announcement, params) do
+    changeset = change(announcement, params)
+
+    Repo.update(changeset)
+  end
+
+  def list_all do
+    __MODULE__
+    |> Repo.all()
+  end
+
+  def list_paginated(%{limit: limited_number, offset: offset_number}) do
+    __MODULE__
+    |> limit(^limited_number)
+    |> offset(^offset_number)
+    |> Repo.all()
+  end
+
+  def get_by_id(id) do
+    Repo.get_by(__MODULE__, id: id)
+  end
+
+  def delete_by_id(id) do
+    with announcement when not is_nil(announcement) <- get_by_id(id),
+         {:ok, _} <- Repo.delete(announcement) do
+      :ok
+    else
+      _ ->
+        :error
+    end
+  end
+
+  def read_by?(announcement, user) do
+    AnnouncementReadRelationship.exists?(user, announcement)
+  end
+
+  def mark_read_by(announcement, user) do
+    AnnouncementReadRelationship.mark_read(user, announcement)
+  end
+
+  def render_json(announcement, opts \\ []) do
+    extra_params =
+      case Keyword.fetch(opts, :for) do
+        {:ok, user} when not is_nil(user) ->
+          %{read: read_by?(announcement, user)}
+
+        _ ->
+          %{}
+      end
+
+    admin_extra_params =
+      case Keyword.fetch(opts, :admin) do
+        {:ok, true} ->
+          %{pleroma: %{raw_content: announcement.data["content"]}}
+
+        _ ->
+          %{}
+      end
+
+    base = %{
+      id: announcement.id,
+      content: announcement.rendered["content"],
+      starts_at: announcement.starts_at,
+      ends_at: announcement.ends_at,
+      all_day: announcement.data["all_day"],
+      published_at: announcement.inserted_at,
+      updated_at: announcement.updated_at,
+      mentions: [],
+      statuses: [],
+      tags: [],
+      emojis: [],
+      reactions: []
+    }
+
+    base
+    |> Map.merge(extra_params)
+    |> Map.merge(admin_extra_params)
+  end
+
+  # "visible" means:
+  # starts_at < time < ends_at
+  def list_all_visible_when(time) do
+    __MODULE__
+    |> where([a], is_nil(a.starts_at) or a.starts_at < ^time)
+    |> where([a], is_nil(a.ends_at) or a.ends_at > ^time)
+    |> Repo.all()
+  end
+
+  def list_all_visible do
+    list_all_visible_when(DateTime.now("Etc/UTC") |> elem(1))
+  end
+end
diff --git a/lib/pleroma/announcement_read_relationship.ex b/lib/pleroma/announcement_read_relationship.ex
new file mode 100644
index 000000000..9b64404ce
--- /dev/null
+++ b/lib/pleroma/announcement_read_relationship.ex
@@ -0,0 +1,55 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.AnnouncementReadRelationship do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+
+  alias FlakeId.Ecto.CompatType
+  alias Pleroma.Announcement
+  alias Pleroma.Repo
+  alias Pleroma.User
+
+  @type t :: %__MODULE__{}
+
+  schema "announcement_read_relationships" do
+    belongs_to(:user, User, type: CompatType)
+    belongs_to(:announcement, Announcement, type: CompatType)
+
+    timestamps(updated_at: false)
+  end
+
+  def mark_read(user, announcement) do
+    %__MODULE__{}
+    |> cast(%{user_id: user.id, announcement_id: announcement.id}, [:user_id, :announcement_id])
+    |> validate_required([:user_id, :announcement_id])
+    |> foreign_key_constraint(:user_id)
+    |> foreign_key_constraint(:announcement_id)
+    |> unique_constraint([:user_id, :announcement_id])
+    |> Repo.insert()
+  end
+
+  def mark_unread(user, announcement) do
+    with relationship <- get(user, announcement),
+         {:exists, true} <- {:exists, not is_nil(relationship)},
+         {:ok, _} <- Repo.delete(relationship) do
+      :ok
+    else
+      {:exists, false} ->
+        :ok
+
+      _ ->
+        :error
+    end
+  end
+
+  def get(user, announcement) do
+    Repo.get_by(__MODULE__, user_id: user.id, announcement_id: announcement.id)
+  end
+
+  def exists?(user, announcement) do
+    not is_nil(get(user, announcement))
+  end
+end
diff --git a/lib/pleroma/application_requirements.ex b/lib/pleroma/application_requirements.ex
index 06d388694..44b1c1705 100644
--- a/lib/pleroma/application_requirements.ex
+++ b/lib/pleroma/application_requirements.ex
@@ -164,7 +164,8 @@ defp do_check_rum!(setting, migrate) do
 
   defp check_system_commands!(:ok) do
     filter_commands_statuses = [
-      check_filter(Pleroma.Upload.Filter.Exiftool, "exiftool"),
+      check_filter(Pleroma.Upload.Filter.Exiftool.StripLocation, "exiftool"),
+      check_filter(Pleroma.Upload.Filter.Exiftool.ReadDescription, "exiftool"),
       check_filter(Pleroma.Upload.Filter.Mogrify, "mogrify"),
       check_filter(Pleroma.Upload.Filter.Mogrifun, "mogrify"),
       check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "mogrify"),
diff --git a/lib/pleroma/config/deprecation_warnings.ex b/lib/pleroma/config/deprecation_warnings.ex
index 118dd3acc..599f1d3cf 100644
--- a/lib/pleroma/config/deprecation_warnings.ex
+++ b/lib/pleroma/config/deprecation_warnings.ex
@@ -20,6 +20,43 @@ defmodule Pleroma.Config.DeprecationWarnings do
      "\n* `config :pleroma, :instance, mrf_transparency_exclusions` is now `config :pleroma, :mrf, transparency_exclusions`"}
   ]
 
+  def check_exiftool_filter do
+    filters = Config.get([Pleroma.Upload]) |> Keyword.get(:filters, [])
+
+    if Pleroma.Upload.Filter.Exiftool in filters do
+      Logger.warn("""
+      !!!DEPRECATION WARNING!!!
+      Your config is using Exiftool as a filter instead of Exiftool.StripLocation. This should work for now, but you are advised to change to the new configuration to prevent possible issues later:
+
+      ```
+      config :pleroma, Pleroma.Upload,
+        filters: [Pleroma.Upload.Filter.Exiftool]
+      ```
+
+      Is now
+
+
+      ```
+      config :pleroma, Pleroma.Upload,
+        filters: [Pleroma.Upload.Filter.Exiftool.StripLocation]
+      ```
+      """)
+
+      new_config =
+        filters
+        |> Enum.map(fn
+          Pleroma.Upload.Filter.Exiftool -> Pleroma.Upload.Filter.Exiftool.StripLocation
+          filter -> filter
+        end)
+
+      Config.put([Pleroma.Upload, :filters], new_config)
+
+      :error
+    else
+      :ok
+    end
+  end
+
   def check_simple_policy_tuples do
     has_strings =
       Config.get([:mrf_simple])
@@ -180,7 +217,8 @@ def warn do
       check_old_chat_shoutbox(),
       check_quarantined_instances_tuples(),
       check_transparency_exclusions_tuples(),
-      check_simple_policy_tuples()
+      check_simple_policy_tuples(),
+      check_exiftool_filter()
     ]
     |> Enum.reduce(:ok, fn
       :ok, :ok -> :ok
diff --git a/lib/pleroma/constants.ex b/lib/pleroma/constants.ex
index 1b3d09d73..cfb405218 100644
--- a/lib/pleroma/constants.ex
+++ b/lib/pleroma/constants.ex
@@ -63,4 +63,10 @@ defmodule Pleroma.Constants do
       "Service"
     ]
   )
+
+  # basic regex, just there to weed out potential mistakes
+  # https://datatracker.ietf.org/doc/html/rfc2045#section-5.1
+  const(mime_regex,
+    do: ~r/^[^[:cntrl:] ()<>@,;:\\"\/\[\]?=]+\/[^[:cntrl:] ()<>@,;:\\"\/\[\]?=]+(; .*)?$/
+  )
 end
diff --git a/lib/pleroma/ecto_type/activity_pub/object_validators/mime.ex b/lib/pleroma/ecto_type/activity_pub/object_validators/mime.ex
new file mode 100644
index 000000000..31d51577d
--- /dev/null
+++ b/lib/pleroma/ecto_type/activity_pub/object_validators/mime.ex
@@ -0,0 +1,25 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.MIME do
+  use Ecto.Type
+
+  require Pleroma.Constants
+
+  def type, do: :string
+
+  def cast(mime) when is_binary(mime) do
+    if mime =~ Pleroma.Constants.mime_regex() do
+      {:ok, mime}
+    else
+      {:ok, "application/octet-stream"}
+    end
+  end
+
+  def cast(_), do: :error
+
+  def dump(data), do: {:ok, data}
+
+  def load(data), do: {:ok, data}
+end
diff --git a/lib/pleroma/http/adapter_helper/hackney.ex b/lib/pleroma/http/adapter_helper/hackney.ex
index b4f2f0cc2..f3be1f3d0 100644
--- a/lib/pleroma/http/adapter_helper/hackney.ex
+++ b/lib/pleroma/http/adapter_helper/hackney.ex
@@ -24,10 +24,6 @@ def options(connection_opts \\ [], %URI{} = uri) do
     |> Pleroma.HTTP.AdapterHelper.maybe_add_proxy(proxy)
   end
 
-  defp add_scheme_opts(opts, %URI{scheme: "https"}) do
-    Keyword.put(opts, :ssl_options, versions: [:"tlsv1.2", :"tlsv1.1", :tlsv1])
-  end
-
   defp add_scheme_opts(opts, _), do: opts
 
   defp maybe_add_with_body(opts) do
diff --git a/lib/pleroma/reverse_proxy/client/hackney.ex b/lib/pleroma/reverse_proxy/client/hackney.ex
index 41eaf06cc..d3e986912 100644
--- a/lib/pleroma/reverse_proxy/client/hackney.ex
+++ b/lib/pleroma/reverse_proxy/client/hackney.ex
@@ -7,7 +7,6 @@ defmodule Pleroma.ReverseProxy.Client.Hackney do
 
   @impl true
   def request(method, url, headers, body, opts \\ []) do
-    opts = Keyword.put(opts, :ssl_options, versions: [:"tlsv1.2", :"tlsv1.1", :tlsv1])
     :hackney.request(method, url, headers, body, opts)
   end
 
diff --git a/lib/pleroma/upload.ex b/lib/pleroma/upload.ex
index 7480c57a6..4aee9326f 100644
--- a/lib/pleroma/upload.ex
+++ b/lib/pleroma/upload.ex
@@ -61,12 +61,23 @@ defmodule Pleroma.Upload do
           width: integer(),
           height: integer(),
           blurhash: String.t(),
+          description: String.t(),
           path: String.t()
         }
-  defstruct [:id, :name, :tempfile, :content_type, :width, :height, :blurhash, :path]
+  defstruct [
+    :id,
+    :name,
+    :tempfile,
+    :content_type,
+    :width,
+    :height,
+    :blurhash,
+    :description,
+    :path
+  ]
 
-  defp get_description(opts, upload) do
-    case {opts[:description], Pleroma.Config.get([Pleroma.Upload, :default_description])} do
+  defp get_description(upload) do
+    case {upload.description, Pleroma.Config.get([Pleroma.Upload, :default_description])} do
       {description, _} when is_binary(description) -> description
       {_, :filename} -> upload.name
       {_, str} when is_binary(str) -> str
@@ -82,7 +93,7 @@ def store(upload, opts \\ []) do
     with {:ok, upload} <- prepare_upload(upload, opts),
          upload = %__MODULE__{upload | path: upload.path || "#{upload.id}/#{upload.name}"},
          {:ok, upload} <- Pleroma.Upload.Filter.filter(opts.filters, upload),
-         description = get_description(opts, upload),
+         description = get_description(upload),
          {_, true} <-
            {:description_limit,
             String.length(description) <= Pleroma.Config.get([:instance, :description_limit])},
@@ -154,7 +165,8 @@ defp prepare_upload(%Plug.Upload{} = file, opts) do
          id: UUID.generate(),
          name: file.filename,
          tempfile: file.path,
-         content_type: file.content_type
+         content_type: file.content_type,
+         description: opts.description
        }}
     end
   end
@@ -174,7 +186,8 @@ defp prepare_upload(%{img: "data:image/" <> image_data}, opts) do
          id: UUID.generate(),
          name: hash <> "." <> ext,
          tempfile: tmp_path,
-         content_type: content_type
+         content_type: content_type,
+         description: opts.description
        }}
     end
   end
diff --git a/lib/pleroma/upload/filter/exiftool/read_description.ex b/lib/pleroma/upload/filter/exiftool/read_description.ex
new file mode 100644
index 000000000..03d698a81
--- /dev/null
+++ b/lib/pleroma/upload/filter/exiftool/read_description.ex
@@ -0,0 +1,49 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.Exiftool.ReadDescription do
+  @moduledoc """
+  Gets a valid description from the related EXIF tags and provides them in the response if no description is provided yet.
+  It will first check ImageDescription, when that doesn't probide a valid description, it will check iptc:Caption-Abstract.
+  A valid description means the fields are filled in and not too long (see `:instance, :description_limit`).
+  """
+  @behaviour Pleroma.Upload.Filter
+
+  @spec filter(Pleroma.Upload.t()) :: {:ok, any()} | {:error, String.t()}
+
+  def filter(%Pleroma.Upload{description: description})
+      when is_binary(description),
+      do: {:ok, :noop}
+
+  def filter(%Pleroma.Upload{tempfile: file} = upload),
+    do: {:ok, :filtered, upload |> Map.put(:description, read_description_from_exif_data(file))}
+
+  def filter(_, _), do: {:ok, :noop}
+
+  defp read_description_from_exif_data(file) do
+    nil
+    |> read_when_empty(file, "-ImageDescription")
+    |> read_when_empty(file, "-iptc:Caption-Abstract")
+  end
+
+  defp read_when_empty(current_description, _, _) when is_binary(current_description),
+    do: current_description
+
+  defp read_when_empty(_, file, tag) do
+    try do
+      {tag_content, 0} =
+        System.cmd("exiftool", ["-b", "-s3", tag, file], stderr_to_stdout: true, parallelism: true)
+
+      tag_content = String.trim(tag_content)
+
+      if tag_content != "" and
+           String.length(tag_content) <=
+             Pleroma.Config.get([:instance, :description_limit]),
+         do: tag_content,
+         else: nil
+    rescue
+      _ in ErlangError -> nil
+    end
+  end
+end
diff --git a/lib/pleroma/upload/filter/exiftool.ex b/lib/pleroma/upload/filter/exiftool/strip_location.ex
similarity index 94%
rename from lib/pleroma/upload/filter/exiftool.ex
rename to lib/pleroma/upload/filter/exiftool/strip_location.ex
index 36cc045c2..6100527d3 100644
--- a/lib/pleroma/upload/filter/exiftool.ex
+++ b/lib/pleroma/upload/filter/exiftool/strip_location.ex
@@ -2,7 +2,7 @@
 # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.Upload.Filter.Exiftool do
+defmodule Pleroma.Upload.Filter.Exiftool.StripLocation do
   @moduledoc """
   Strips GPS related EXIF tags and overwrites the file in place.
   Also strips or replaces filesystem metadata e.g., timestamps.
diff --git a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
index ca6e39612..3aae167c9 100644
--- a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
@@ -13,14 +13,14 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
   embedded_schema do
     field(:id, :string)
     field(:type, :string)
-    field(:mediaType, :string, default: "application/octet-stream")
+    field(:mediaType, ObjectValidators.MIME, default: "application/octet-stream")
     field(:name, :string)
     field(:blurhash, :string)
 
     embeds_many :url, UrlObjectValidator, primary_key: false do
       field(:type, :string)
       field(:href, ObjectValidators.Uri)
-      field(:mediaType, :string, default: "application/octet-stream")
+      field(:mediaType, ObjectValidators.MIME, default: "application/octet-stream")
       field(:width, :integer)
       field(:height, :integer)
     end
@@ -60,13 +60,7 @@ def url_changeset(struct, data) do
   end
 
   def fix_media_type(data) do
-    data = Map.put_new(data, "mediaType", data["mimeType"])
-
-    if is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] do
-      data
-    else
-      Map.put(data, "mediaType", "application/octet-stream")
-    end
+    Map.put_new(data, "mediaType", data["mimeType"])
   end
 
   defp handle_href(href, mediaType, data) do
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index cccee342f..e4c04da0d 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -203,13 +203,13 @@ def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachm
 
         media_type =
           cond do
-            is_map(url) && MIME.extensions(url["mediaType"]) != [] ->
+            is_map(url) && url =~ Pleroma.Constants.mime_regex() ->
               url["mediaType"]
 
-            is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] ->
+            is_bitstring(data["mediaType"]) && data["mediaType"] =~ Pleroma.Constants.mime_regex() ->
               data["mediaType"]
 
-            is_bitstring(data["mimeType"]) && MIME.extensions(data["mimeType"]) != [] ->
+            is_bitstring(data["mimeType"]) && data["mimeType"] =~ Pleroma.Constants.mime_regex() ->
               data["mimeType"]
 
             true ->
diff --git a/lib/pleroma/web/admin_api/controllers/announcement_controller.ex b/lib/pleroma/web/admin_api/controllers/announcement_controller.ex
new file mode 100644
index 000000000..6ad5fc12c
--- /dev/null
+++ b/lib/pleroma/web/admin_api/controllers/announcement_controller.ex
@@ -0,0 +1,83 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.AnnouncementController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Announcement
+  alias Pleroma.Web.ControllerHelper
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+  plug(OAuthScopesPlug, %{scopes: ["admin:write"]} when action in [:create, :delete, :change])
+  plug(OAuthScopesPlug, %{scopes: ["admin:read"]} when action in [:index, :show])
+  action_fallback(Pleroma.Web.AdminAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.AnnouncementOperation
+
+  defp default_limit, do: 20
+
+  def index(conn, params) do
+    limit = Map.get(params, :limit, default_limit())
+    offset = Map.get(params, :offset, 0)
+
+    announcements = Announcement.list_paginated(%{limit: limit, offset: offset})
+
+    render(conn, "index.json", announcements: announcements)
+  end
+
+  def show(conn, %{id: id} = _params) do
+    announcement = Announcement.get_by_id(id)
+
+    if is_nil(announcement) do
+      {:error, :not_found}
+    else
+      render(conn, "show.json", announcement: announcement)
+    end
+  end
+
+  def create(%{body_params: params} = conn, _params) do
+    with {:ok, announcement} <- Announcement.add(change_params(params)) do
+      render(conn, "show.json", announcement: announcement)
+    else
+      _ ->
+        {:error, 400}
+    end
+  end
+
+  def change_params(orig_params) do
+    data =
+      %{}
+      |> Pleroma.Maps.put_if_present("content", orig_params, &Map.fetch(&1, :content))
+      |> Pleroma.Maps.put_if_present("all_day", orig_params, &Map.fetch(&1, :all_day))
+
+    orig_params
+    |> Map.merge(%{data: data})
+  end
+
+  def change(%{body_params: params} = conn, %{id: id} = _params) do
+    with announcement <- Announcement.get_by_id(id),
+         {:exists, true} <- {:exists, not is_nil(announcement)},
+         {:ok, announcement} <- Announcement.update(announcement, change_params(params)) do
+      render(conn, "show.json", announcement: announcement)
+    else
+      {:exists, false} ->
+        {:error, :not_found}
+
+      _ ->
+        {:error, 400}
+    end
+  end
+
+  def delete(conn, %{id: id} = _params) do
+    case Announcement.delete_by_id(id) do
+      :ok ->
+        conn
+        |> ControllerHelper.json_response(:ok, %{})
+
+      _ ->
+        {:error, :not_found}
+    end
+  end
+end
diff --git a/lib/pleroma/web/admin_api/views/announcement_view.ex b/lib/pleroma/web/admin_api/views/announcement_view.ex
new file mode 100644
index 000000000..a35bd60cf
--- /dev/null
+++ b/lib/pleroma/web/admin_api/views/announcement_view.ex
@@ -0,0 +1,15 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.AnnouncementView do
+  use Pleroma.Web, :view
+
+  def render("index.json", %{announcements: announcements}) do
+    render_many(announcements, __MODULE__, "show.json")
+  end
+
+  def render("show.json", %{announcement: announcement}) do
+    Pleroma.Announcement.render_json(announcement, admin: true)
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex b/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex
new file mode 100644
index 000000000..58a039e72
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/admin/announcement_operation.ex
@@ -0,0 +1,165 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Admin.AnnouncementOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.Announcement
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Announcement managment"],
+      summary: "Retrieve a list of announcements",
+      operationId: "AdminAPI.AnnouncementController.index",
+      security: [%{"oAuth" => ["admin:read"]}],
+      parameters: [
+        Operation.parameter(
+          :limit,
+          :query,
+          %Schema{type: :integer, minimum: 1},
+          "the maximum number of announcements to return"
+        ),
+        Operation.parameter(
+          :offset,
+          :query,
+          %Schema{type: :integer, minimum: 0},
+          "the offset of the first announcement to return"
+        )
+        | admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", list_of_announcements()),
+        400 => Operation.response("Forbidden", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Announcement managment"],
+      summary: "Display one announcement",
+      operationId: "AdminAPI.AnnouncementController.show",
+      security: [%{"oAuth" => ["admin:read"]}],
+      parameters: [
+        Operation.parameter(
+          :id,
+          :path,
+          :string,
+          "announcement id"
+        )
+        | admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", Announcement),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def delete_operation do
+    %Operation{
+      tags: ["Announcement managment"],
+      summary: "Delete one announcement",
+      operationId: "AdminAPI.AnnouncementController.delete",
+      security: [%{"oAuth" => ["admin:write"]}],
+      parameters: [
+        Operation.parameter(
+          :id,
+          :path,
+          :string,
+          "announcement id"
+        )
+        | admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", %Schema{type: :object}),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def create_operation do
+    %Operation{
+      tags: ["Announcement managment"],
+      summary: "Create one announcement",
+      operationId: "AdminAPI.AnnouncementController.create",
+      security: [%{"oAuth" => ["admin:write"]}],
+      requestBody: request_body("Parameters", create_request(), required: true),
+      responses: %{
+        200 => Operation.response("Response", "application/json", Announcement),
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def change_operation do
+    %Operation{
+      tags: ["Announcement managment"],
+      summary: "Change one announcement",
+      operationId: "AdminAPI.AnnouncementController.change",
+      security: [%{"oAuth" => ["admin:write"]}],
+      parameters: [
+        Operation.parameter(
+          :id,
+          :path,
+          :string,
+          "announcement id"
+        )
+        | admin_api_params()
+      ],
+      requestBody: request_body("Parameters", change_request(), required: true),
+      responses: %{
+        200 => Operation.response("Response", "application/json", Announcement),
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp create_or_change_props do
+    %{
+      content: %Schema{type: :string},
+      starts_at: %Schema{type: :string, format: "date-time", nullable: true},
+      ends_at: %Schema{type: :string, format: "date-time", nullable: true},
+      all_day: %Schema{type: :boolean}
+    }
+  end
+
+  def create_request do
+    %Schema{
+      title: "AnnouncementCreateRequest",
+      type: :object,
+      required: [:content],
+      properties: create_or_change_props()
+    }
+  end
+
+  def change_request do
+    %Schema{
+      title: "AnnouncementChangeRequest",
+      type: :object,
+      properties: create_or_change_props()
+    }
+  end
+
+  def list_of_announcements do
+    %Schema{
+      type: :array,
+      items: Announcement
+    }
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/announcement_operation.ex b/lib/pleroma/web/api_spec/operations/announcement_operation.ex
new file mode 100644
index 000000000..71be0002a
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/announcement_operation.ex
@@ -0,0 +1,57 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.AnnouncementOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.Announcement
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Announcement"],
+      summary: "Retrieve a list of announcements",
+      operationId: "MastodonAPI.AnnouncementController.index",
+      security: [%{"oAuth" => []}],
+      responses: %{
+        200 => Operation.response("Response", "application/json", list_of_announcements()),
+        403 => Operation.response("Forbidden", "application/json", ApiError)
+      }
+    }
+  end
+
+  def mark_read_operation do
+    %Operation{
+      tags: ["Announcement"],
+      summary: "Mark one announcement as read",
+      operationId: "MastodonAPI.AnnouncementController.mark_read",
+      security: [%{"oAuth" => ["write:accounts"]}],
+      parameters: [
+        Operation.parameter(
+          :id,
+          :path,
+          :string,
+          "announcement id"
+        )
+      ],
+      responses: %{
+        200 => Operation.response("Response", "application/json", %Schema{type: :object}),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def list_of_announcements do
+    %Schema{
+      type: :array,
+      items: Announcement
+    }
+  end
+end
diff --git a/lib/pleroma/web/api_spec/schemas/announcement.ex b/lib/pleroma/web/api_spec/schemas/announcement.ex
new file mode 100644
index 000000000..67d129ef6
--- /dev/null
+++ b/lib/pleroma/web/api_spec/schemas/announcement.ex
@@ -0,0 +1,45 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Schemas.Announcement do
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.FlakeID
+
+  require OpenApiSpex
+
+  OpenApiSpex.schema(%{
+    title: "Announcement",
+    description: "Response schema for an announcement",
+    type: :object,
+    properties: %{
+      id: FlakeID,
+      content: %Schema{type: :string},
+      starts_at: %Schema{
+        type: :string,
+        format: "date-time",
+        nullable: true
+      },
+      ends_at: %Schema{
+        type: :string,
+        format: "date-time",
+        nullable: true
+      },
+      all_day: %Schema{type: :boolean},
+      published_at: %Schema{type: :string, format: "date-time"},
+      updated_at: %Schema{type: :string, format: "date-time"},
+      read: %Schema{type: :boolean},
+      mentions: %Schema{type: :array},
+      statuses: %Schema{type: :array},
+      tags: %Schema{type: :array},
+      emojis: %Schema{type: :array},
+      reactions: %Schema{type: :array},
+      pleroma: %Schema{
+        type: :object,
+        properties: %{
+          raw_content: %Schema{type: :string}
+        }
+      }
+    }
+  })
+end
diff --git a/lib/pleroma/web/mastodon_api/controllers/announcement_controller.ex b/lib/pleroma/web/mastodon_api/controllers/announcement_controller.ex
new file mode 100644
index 000000000..080af96d5
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/controllers/announcement_controller.ex
@@ -0,0 +1,60 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.AnnouncementController do
+  use Pleroma.Web, :controller
+
+  import Pleroma.Web.ControllerHelper,
+    only: [
+      json_response: 3
+    ]
+
+  alias Pleroma.Announcement
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  # Mastodon docs say this only requires a user token, no scopes needed
+  # As the op `|` requires at least one scope to be present, we use `&` here.
+  plug(
+    OAuthScopesPlug,
+    %{scopes: [], op: :&}
+    when action in [:index]
+  )
+
+  # Same as in MastodonAPI specs
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["write:accounts"]}
+    when action in [:mark_read]
+  )
+
+  action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.AnnouncementOperation
+
+  @doc "GET /api/v1/announcements"
+  def index(%{assigns: %{user: user}} = conn, _params) do
+    render(conn, "index.json", announcements: all_visible(), user: user)
+  end
+
+  def index(conn, _params) do
+    render(conn, "index.json", announcements: all_visible(), user: nil)
+  end
+
+  defp all_visible do
+    Announcement.list_all_visible()
+  end
+
+  @doc "POST /api/v1/announcements/:id/dismiss"
+  def mark_read(%{assigns: %{user: user}} = conn, %{id: id} = _params) do
+    with announcement when not is_nil(announcement) <- Announcement.get_by_id(id),
+         {:ok, _} <- Announcement.mark_read_by(announcement, user) do
+      json_response(conn, :ok, %{})
+    else
+      _ ->
+        {:error, :not_found}
+    end
+  end
+end
diff --git a/lib/pleroma/web/mastodon_api/views/announcement_view.ex b/lib/pleroma/web/mastodon_api/views/announcement_view.ex
new file mode 100644
index 000000000..93fdfb1f1
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/views/announcement_view.ex
@@ -0,0 +1,15 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.AnnouncementView do
+  use Pleroma.Web, :view
+
+  def render("index.json", %{announcements: announcements, user: user}) do
+    render_many(announcements, __MODULE__, "show.json", user: user)
+  end
+
+  def render("show.json", %{announcement: announcement, user: user}) do
+    Pleroma.Announcement.render_json(announcement, for: user)
+  end
+end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 4a999f0c2..7a9f39fd2 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -229,6 +229,12 @@ defmodule Pleroma.Web.Router do
     post("/frontends/install", FrontendController, :install)
 
     post("/backups", AdminAPIController, :create_backup)
+
+    get("/announcements", AnnouncementController, :index)
+    post("/announcements", AnnouncementController, :create)
+    get("/announcements/:id", AnnouncementController, :show)
+    patch("/announcements/:id", AnnouncementController, :change)
+    delete("/announcements/:id", AnnouncementController, :delete)
   end
 
   # AdminAPI: admins and mods (staff) can perform these actions (if enabled by config)
@@ -576,6 +582,9 @@ defmodule Pleroma.Web.Router do
     get("/timelines/home", TimelineController, :home)
     get("/timelines/direct", TimelineController, :direct)
     get("/timelines/list/:list_id", TimelineController, :list)
+
+    get("/announcements", AnnouncementController, :index)
+    post("/announcements/:id/dismiss", AnnouncementController, :mark_read)
   end
 
   scope "/api/v1", Pleroma.Web.MastodonAPI do
diff --git a/mix.exs b/mix.exs
index 0651781cc..6e84fe482 100644
--- a/mix.exs
+++ b/mix.exs
@@ -194,7 +194,7 @@ defp deps do
        ref: "e0f16822d578866e186a0974d65ad58cddc1e2ab"},
       {:restarter, path: "./restarter"},
       {:majic, "~> 1.0"},
-      {:eblurhash, "~> 1.1.0"},
+      {:eblurhash, "~> 1.2.2"},
       {:open_api_spex, "~> 3.10"},
       {:phoenix_live_dashboard, "~> 0.6.2"},
       {:ecto_psql_extras, "~> 0.6"},
diff --git a/mix.lock b/mix.lock
index 44a8054ea..14e43c703 100644
--- a/mix.lock
+++ b/mix.lock
@@ -29,7 +29,7 @@
   "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
   "earmark": {:hex, :earmark, "1.4.18", "618c4ff1563450d1832b7fb41dc6755e470f91a6fd4c70f350a58b14f64a7db8", [:mix], [{:earmark_parser, ">= 1.4.17", [hex: :earmark_parser, repo: "hexpm", optional: false]}], "hexpm", "57ac3b6da3958ed09c669a9b159e86377fcccda56bacde8a209fa4dcdef52560"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.17", "6f3c7e94170377ba45241d394389e800fb15adc5de51d0a3cd52ae766aafd63f", [:mix], [], "hexpm", "f93ac89c9feca61c165b264b5837bf82344d13bebc634cd575cb711e2e342023"},
-  "eblurhash": {:hex, :eblurhash, "1.1.0", "e10ccae762598507ebfacf0b645ed49520f2afa3e7e9943e73a91117dffce415", [:rebar3], [], "hexpm", "2e6b889d09fddd374e3c5ac57c486138768763264e99ac1074ae5fa7fc9ab51d"},
+  "eblurhash": {:hex, :eblurhash, "1.2.2", "7da4255aaea984b31bb71155f673257353b0e0554d0d30dcf859547e74602582", [:rebar3], [], "hexpm", "8c20ca00904de023a835a9dcb7b7762fed32264c85a80c3cafa85288e405044c"},
   "ecto": {:hex, :ecto, "3.6.2", "efdf52acfc4ce29249bab5417415bd50abd62db7b0603b8bab0d7b996548c2bc", [:mix], [{:decimal, "~> 1.6 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "efad6dfb04e6f986b8a3047822b0f826d9affe8e4ebdd2aeedbfcb14fd48884e"},
   "ecto_enum": {:hex, :ecto_enum, "1.4.0", "d14b00e04b974afc69c251632d1e49594d899067ee2b376277efd8233027aec8", [:mix], [{:ecto, ">= 3.0.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:ecto_sql, "> 3.0.0", [hex: :ecto_sql, repo: "hexpm", optional: false]}, {:mariaex, ">= 0.0.0", [hex: :mariaex, repo: "hexpm", optional: true]}, {:postgrex, ">= 0.0.0", [hex: :postgrex, repo: "hexpm", optional: true]}], "hexpm", "8fb55c087181c2b15eee406519dc22578fa60dd82c088be376d0010172764ee4"},
   "ecto_psql_extras": {:hex, :ecto_psql_extras, "0.7.4", "5d43fd088d39a158c860b17e8d210669587f63ec89ea122a4654861c8c6e2db4", [:mix], [{:ecto_sql, "~> 3.4", [hex: :ecto_sql, repo: "hexpm", optional: false]}, {:postgrex, ">= 0.15.7", [hex: :postgrex, repo: "hexpm", optional: false]}, {:table_rex, "~> 3.1.1", [hex: :table_rex, repo: "hexpm", optional: false]}], "hexpm", "311db02f1b772e3d0dc7f56a05044b5e1499d78ed6abf38885e1ca70059449e5"},
diff --git a/priv/repo/migrations/20220220135625_upload_filter_exiftool_to_exiftool_strip_location.exs b/priv/repo/migrations/20220220135625_upload_filter_exiftool_to_exiftool_strip_location.exs
new file mode 100644
index 000000000..0878b9699
--- /dev/null
+++ b/priv/repo/migrations/20220220135625_upload_filter_exiftool_to_exiftool_strip_location.exs
@@ -0,0 +1,37 @@
+defmodule Pleroma.Repo.Migrations.UploadFilterExiftoolToExiftoolStripLocation do
+  use Ecto.Migration
+
+  alias Pleroma.ConfigDB
+
+  def up,
+    do:
+      ConfigDB.get_by_params(%{group: :pleroma, key: Pleroma.Upload})
+      |> update_filtername(
+        Pleroma.Upload.Filter.Exiftool,
+        Pleroma.Upload.Filter.Exiftool.StripLocation
+      )
+
+  def down,
+    do:
+      ConfigDB.get_by_params(%{group: :pleroma, key: Pleroma.Upload})
+      |> update_filtername(
+        Pleroma.Upload.Filter.Exiftool.StripLocation,
+        Pleroma.Upload.Filter.Exiftool
+      )
+
+  defp update_filtername(%{value: value}, from_filtername, to_filtername) do
+    new_value =
+      value
+      |> Keyword.update(:filters, [], fn filters ->
+        filters
+        |> Enum.map(fn
+          ^from_filtername -> to_filtername
+          filter -> filter
+        end)
+      end)
+
+    ConfigDB.update_or_create(%{group: :pleroma, key: Pleroma.Upload, value: new_value})
+  end
+
+  defp update_filtername(_, _, _), do: nil
+end
diff --git a/priv/repo/migrations/20220308012601_create_announcements.exs b/priv/repo/migrations/20220308012601_create_announcements.exs
new file mode 100644
index 000000000..01c9ce041
--- /dev/null
+++ b/priv/repo/migrations/20220308012601_create_announcements.exs
@@ -0,0 +1,26 @@
+defmodule Pleroma.Repo.Migrations.CreateAnnouncements do
+  use Ecto.Migration
+
+  def change do
+    create_if_not_exists table(:announcements, primary_key: false) do
+      add(:id, :uuid, primary_key: true)
+      add(:data, :map)
+      add(:starts_at, :naive_datetime)
+      add(:ends_at, :naive_datetime)
+      add(:rendered, :map)
+
+      timestamps()
+    end
+
+    create_if_not_exists table(:announcement_read_relationships) do
+      add(:user_id, references(:users, type: :uuid, on_delete: :delete_all))
+      add(:announcement_id, references(:announcements, type: :uuid, on_delete: :delete_all))
+
+      timestamps(updated_at: false)
+    end
+
+    create_if_not_exists(
+      unique_index(:announcement_read_relationships, [:user_id, :announcement_id])
+    )
+  end
+end
diff --git a/priv/repo/migrations/20220506175506_add_index_hotspots.exs b/priv/repo/migrations/20220506175506_add_index_hotspots.exs
new file mode 100644
index 000000000..e1f59bbac
--- /dev/null
+++ b/priv/repo/migrations/20220506175506_add_index_hotspots.exs
@@ -0,0 +1,17 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Repo.Migrations.AddIndexHotspots do
+  use Ecto.Migration
+
+  def change do
+    # Stop inserts into activities from doing a full-table scan of users:
+    create_if_not_exists(index(:users, [:ap_id, "COALESCE(follower_address, '')"]))
+
+    # Change two indexes and a filter recheck into one index scan:
+    create_if_not_exists(index(:following_relationships, [:follower_id, :state]))
+
+    create_if_not_exists(index(:notifications, [:user_id, :seen]))
+  end
+end
diff --git a/test/fixtures/image_with_caption-abstract.jpg b/test/fixtures/image_with_caption-abstract.jpg
new file mode 100644
index 000000000..f982ffa81
Binary files /dev/null and b/test/fixtures/image_with_caption-abstract.jpg differ
diff --git a/test/fixtures/image_with_imagedescription_and_caption-abstract.jpg b/test/fixtures/image_with_imagedescription_and_caption-abstract.jpg
new file mode 100644
index 000000000..c82a269ef
Binary files /dev/null and b/test/fixtures/image_with_imagedescription_and_caption-abstract.jpg differ
diff --git a/test/fixtures/image_with_imagedescription_and_caption-abstract_whitespaces.jpg b/test/fixtures/image_with_imagedescription_and_caption-abstract_whitespaces.jpg
new file mode 100644
index 000000000..a232fd2a1
Binary files /dev/null and b/test/fixtures/image_with_imagedescription_and_caption-abstract_whitespaces.jpg differ
diff --git a/test/fixtures/image_with_no_description.jpg b/test/fixtures/image_with_no_description.jpg
new file mode 100644
index 000000000..ec6fc4be8
Binary files /dev/null and b/test/fixtures/image_with_no_description.jpg differ
diff --git a/test/mix/tasks/pleroma/instance_test.exs b/test/mix/tasks/pleroma/instance_test.exs
index 249689ec6..b1c10e03c 100644
--- a/test/mix/tasks/pleroma/instance_test.exs
+++ b/test/mix/tasks/pleroma/instance_test.exs
@@ -67,7 +67,9 @@ test "running gen" do
         "test/uploads",
         "--static-dir",
         "./test/../test/instance/static/",
-        "--strip-uploads",
+        "--strip-uploads-location",
+        "y",
+        "--read-uploads-description",
         "y",
         "--dedupe-uploads",
         "n",
@@ -91,7 +93,10 @@ test "running gen" do
     assert generated_config =~ "password: \"dbpass\""
     assert generated_config =~ "configurable_from_database: true"
     assert generated_config =~ "http: [ip: {127, 0, 0, 1}, port: 4000]"
-    assert generated_config =~ "filters: [Pleroma.Upload.Filter.Exiftool]"
+
+    assert generated_config =~
+             "filters: [Pleroma.Upload.Filter.Exiftool.StripLocation, Pleroma.Upload.Filter.Exiftool.ReadDescription]"
+
     assert File.read!(tmp_path() <> "setup.psql") == generated_setup_psql()
     assert File.exists?(Path.expand("./test/instance/static/robots.txt"))
   end
diff --git a/test/pleroma/announcement_read_relationship_test.exs b/test/pleroma/announcement_read_relationship_test.exs
new file mode 100644
index 000000000..5fd4ffbef
--- /dev/null
+++ b/test/pleroma/announcement_read_relationship_test.exs
@@ -0,0 +1,40 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.AnnouncementReadRelationshipTest do
+  alias Pleroma.AnnouncementReadRelationship
+
+  use Pleroma.DataCase, async: true
+
+  import Pleroma.Factory
+
+  setup do
+    {:ok, user: insert(:user), announcement: insert(:announcement)}
+  end
+
+  describe "mark_read/2" do
+    test "should insert relationship", %{user: user, announcement: announcement} do
+      {:ok, _} = AnnouncementReadRelationship.mark_read(user, announcement)
+
+      assert AnnouncementReadRelationship.exists?(user, announcement)
+    end
+  end
+
+  describe "mark_unread/2" do
+    test "should delete relationship", %{user: user, announcement: announcement} do
+      {:ok, _} = AnnouncementReadRelationship.mark_read(user, announcement)
+
+      assert :ok = AnnouncementReadRelationship.mark_unread(user, announcement)
+      refute AnnouncementReadRelationship.exists?(user, announcement)
+    end
+
+    test "should not fail if relationship does not exist", %{
+      user: user,
+      announcement: announcement
+    } do
+      assert :ok = AnnouncementReadRelationship.mark_unread(user, announcement)
+      refute AnnouncementReadRelationship.exists?(user, announcement)
+    end
+  end
+end
diff --git a/test/pleroma/announcement_test.exs b/test/pleroma/announcement_test.exs
new file mode 100644
index 000000000..a007c3718
--- /dev/null
+++ b/test/pleroma/announcement_test.exs
@@ -0,0 +1,98 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.AnnouncementTest do
+  alias Pleroma.Announcement
+
+  use Pleroma.DataCase, async: true
+
+  import Pleroma.Factory
+
+  describe "list_all_visible_when/1" do
+    setup do: {:ok, time: NaiveDateTime.utc_now()}
+
+    test "with no start or end time", %{time: time} do
+      _announcement = insert(:announcement)
+
+      assert [_] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with start time before current", %{time: time} do
+      before_now = NaiveDateTime.add(time, -10, :second)
+
+      _announcement = insert(:announcement, %{starts_at: before_now})
+
+      assert [_] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with start time after current", %{time: time} do
+      after_now = NaiveDateTime.add(time, 10, :second)
+
+      _announcement = insert(:announcement, %{starts_at: after_now})
+
+      assert [] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with end time after current", %{time: time} do
+      after_now = NaiveDateTime.add(time, 10, :second)
+
+      _announcement = insert(:announcement, %{ends_at: after_now})
+
+      assert [_] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with end time before current", %{time: time} do
+      before_now = NaiveDateTime.add(time, -10, :second)
+
+      _announcement = insert(:announcement, %{ends_at: before_now})
+
+      assert [] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with both start and end time", %{time: time} do
+      before_now = NaiveDateTime.add(time, -10, :second)
+      after_now = NaiveDateTime.add(time, 10, :second)
+
+      _announcement = insert(:announcement, %{starts_at: before_now, ends_at: after_now})
+
+      assert [_] = Announcement.list_all_visible_when(time)
+    end
+
+    test "with both start and end time, current not in the range", %{time: time} do
+      before_now = NaiveDateTime.add(time, -10, :second)
+      after_now = NaiveDateTime.add(time, 10, :second)
+
+      _announcement = insert(:announcement, %{starts_at: after_now, ends_at: before_now})
+
+      assert [] = Announcement.list_all_visible_when(time)
+    end
+  end
+
+  describe "announcements formatting" do
+    test "it formats links" do
+      raw = "something on https://pleroma.social ."
+      announcement = insert(:announcement, %{data: %{"content" => raw}})
+
+      assert announcement.rendered["content"] =~ ~r(<a.+?https://pleroma.social)
+      assert announcement.data["content"] == raw
+    end
+
+    test "it formats mentions" do
+      user = insert(:user)
+      raw = "something on @#{user.nickname} ."
+      announcement = insert(:announcement, %{data: %{"content" => raw}})
+
+      assert announcement.rendered["content"] =~ ~r(<a.+?#{user.nickname})
+      assert announcement.data["content"] == raw
+    end
+
+    test "it formats tags" do
+      raw = "something on #mew ."
+      announcement = insert(:announcement, %{data: %{"content" => raw}})
+
+      assert announcement.rendered["content"] =~ ~r(<a.+?#mew)
+      assert announcement.data["content"] == raw
+    end
+  end
+end
diff --git a/test/pleroma/config/deprecation_warnings_test.exs b/test/pleroma/config/deprecation_warnings_test.exs
index 202ec4b90..f3453ddb0 100644
--- a/test/pleroma/config/deprecation_warnings_test.exs
+++ b/test/pleroma/config/deprecation_warnings_test.exs
@@ -11,6 +11,62 @@ defmodule Pleroma.Config.DeprecationWarningsTest do
   alias Pleroma.Config
   alias Pleroma.Config.DeprecationWarnings
 
+  describe "filter exiftool" do
+    test "gives warning when still used" do
+      clear_config(
+        [Pleroma.Upload, :filters],
+        [Pleroma.Upload.Filter.Exiftool]
+      )
+
+      assert capture_log(fn -> DeprecationWarnings.check_exiftool_filter() end) =~
+               """
+               !!!DEPRECATION WARNING!!!
+               Your config is using Exiftool as a filter instead of Exiftool.StripLocation. This should work for now, but you are advised to change to the new configuration to prevent possible issues later:
+
+               ```
+               config :pleroma, Pleroma.Upload,
+                 filters: [Pleroma.Upload.Filter.Exiftool]
+               ```
+
+               Is now
+
+
+               ```
+               config :pleroma, Pleroma.Upload,
+                 filters: [Pleroma.Upload.Filter.Exiftool.StripLocation]
+               ```
+               """
+    end
+
+    test "changes setting to exiftool strip location" do
+      clear_config(
+        [Pleroma.Upload, :filters],
+        [Pleroma.Upload.Filter.Exiftool, Pleroma.Upload.Filter.Exiftool.ReadDescription]
+      )
+
+      expected_config = [
+        Pleroma.Upload.Filter.Exiftool.StripLocation,
+        Pleroma.Upload.Filter.Exiftool.ReadDescription
+      ]
+
+      capture_log(fn -> DeprecationWarnings.warn() end)
+
+      assert Config.get([Pleroma.Upload]) |> Keyword.get(:filters, []) == expected_config
+    end
+
+    test "doesn't give a warning with correct config" do
+      clear_config(
+        [Pleroma.Upload, :filters],
+        [
+          Pleroma.Upload.Filter.Exiftool.StripLocation,
+          Pleroma.Upload.Filter.Exiftool.ReadDescription
+        ]
+      )
+
+      assert capture_log(fn -> DeprecationWarnings.check_exiftool_filter() end) == ""
+    end
+  end
+
   describe "simple policy tuples" do
     test "gives warning when there are still strings" do
       clear_config([:mrf_simple],
diff --git a/test/pleroma/config_db_test.exs b/test/pleroma/config_db_test.exs
index ea44b716f..ba7c615e2 100644
--- a/test/pleroma/config_db_test.exs
+++ b/test/pleroma/config_db_test.exs
@@ -238,10 +238,11 @@ test "atom" do
     end
 
     test "ssl options" do
-      assert ConfigDB.to_elixir_types([":tlsv1", ":tlsv1.1", ":tlsv1.2"]) == [
+      assert ConfigDB.to_elixir_types([":tlsv1", ":tlsv1.1", ":tlsv1.2", ":tlsv1.3"]) == [
                :tlsv1,
                :"tlsv1.1",
-               :"tlsv1.2"
+               :"tlsv1.2",
+               :"tlsv1.3"
              ]
     end
 
diff --git a/test/pleroma/docs/generator_test.exs b/test/pleroma/docs/generator_test.exs
index 92b4d13e4..5e41d6ccb 100644
--- a/test/pleroma/docs/generator_test.exs
+++ b/test/pleroma/docs/generator_test.exs
@@ -86,7 +86,7 @@ defmodule Pleroma.Docs.GeneratorTest do
           key: :versions,
           type: {:list, :atom},
           description: "List of TLS version to use",
-          suggestions: [:tlsv1, ":tlsv1.1", ":tlsv1.2"]
+          suggestions: [:tlsv1, ":tlsv1.1", ":tlsv1.2", ":tlsv1.3"]
         }
       ]
     },
@@ -213,7 +213,7 @@ test "key as string subchild" do
     test "suggestion for tls versions" do
       [%{children: children} | _] = Generator.convert_to_strings(@descriptions)
       child = Enum.at(children, 8)
-      assert child[:suggestions] == [":tlsv1", ":tlsv1.1", ":tlsv1.2"]
+      assert child[:suggestions] == [":tlsv1", ":tlsv1.1", ":tlsv1.2", ":tlsv1.3"]
     end
 
     test "subgroup with module name" do
diff --git a/test/pleroma/upload/filter/exiftool/read_description_test.exs b/test/pleroma/upload/filter/exiftool/read_description_test.exs
new file mode 100644
index 000000000..7389fda47
--- /dev/null
+++ b/test/pleroma/upload/filter/exiftool/read_description_test.exs
@@ -0,0 +1,117 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Upload.Filter.Exiftool.ReadDescriptionTest do
+  use Pleroma.DataCase, async: true
+  alias Pleroma.Upload.Filter
+
+  @uploads %Pleroma.Upload{
+    name: "image_with_imagedescription_and_caption-abstract.jpg",
+    content_type: "image/jpeg",
+    path: Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+    tempfile: Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+    description: nil
+  }
+
+  test "keeps description when not empty" do
+    uploads = %Pleroma.Upload{
+      name: "image_with_imagedescription_and_caption-abstract.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+      tempfile:
+        Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+      description: "Some description"
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(uploads) ==
+             {:ok, :noop}
+  end
+
+  test "otherwise returns ImageDescription when present" do
+    uploads_after = %Pleroma.Upload{
+      name: "image_with_imagedescription_and_caption-abstract.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+      tempfile:
+        Path.absname("test/fixtures/image_with_imagedescription_and_caption-abstract.jpg"),
+      description: "a descriptive white pixel"
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(@uploads) ==
+             {:ok, :filtered, uploads_after}
+  end
+
+  test "otherwise returns iptc:Caption-Abstract when present" do
+    upload = %Pleroma.Upload{
+      name: "image_with_caption-abstract.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/image_with_caption-abstract.jpg"),
+      tempfile: Path.absname("test/fixtures/image_with_caption-abstract.jpg"),
+      description: nil
+    }
+
+    upload_after = %Pleroma.Upload{
+      name: "image_with_caption-abstract.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/image_with_caption-abstract.jpg"),
+      tempfile: Path.absname("test/fixtures/image_with_caption-abstract.jpg"),
+      description: "an abstract white pixel"
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(upload) ==
+             {:ok, :filtered, upload_after}
+  end
+
+  test "otherwise returns nil" do
+    uploads = %Pleroma.Upload{
+      name: "image_with_no_description.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/image_with_no_description.jpg"),
+      tempfile: Path.absname("test/fixtures/image_with_no_description.jpg"),
+      description: nil
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(uploads) ==
+             {:ok, :filtered, uploads}
+  end
+
+  test "Return nil when image description from EXIF data exceeds the maximum length" do
+    clear_config([:instance, :description_limit], 5)
+
+    assert Filter.Exiftool.ReadDescription.filter(@uploads) ==
+             {:ok, :filtered, @uploads}
+  end
+
+  test "Ignores content with only whitespace" do
+    uploads = %Pleroma.Upload{
+      name: "non-existant.jpg",
+      content_type: "image/jpeg",
+      path:
+        Path.absname(
+          "test/fixtures/image_with_imagedescription_and_caption-abstract_whitespaces.jpg"
+        ),
+      tempfile:
+        Path.absname(
+          "test/fixtures/image_with_imagedescription_and_caption-abstract_whitespaces.jpg"
+        ),
+      description: nil
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(uploads) ==
+             {:ok, :filtered, uploads}
+  end
+
+  test "Return nil when image description from EXIF data can't be read" do
+    uploads = %Pleroma.Upload{
+      name: "non-existant.jpg",
+      content_type: "image/jpeg",
+      path: Path.absname("test/fixtures/non-existant.jpg"),
+      tempfile: Path.absname("test/fixtures/non-existant_tmp.jpg"),
+      description: nil
+    }
+
+    assert Filter.Exiftool.ReadDescription.filter(uploads) ==
+             {:ok, :filtered, uploads}
+  end
+end
diff --git a/test/pleroma/upload/filter/exiftool_test.exs b/test/pleroma/upload/filter/exiftool/strip_location_test.exs
similarity index 84%
rename from test/pleroma/upload/filter/exiftool_test.exs
rename to test/pleroma/upload/filter/exiftool/strip_location_test.exs
index 0a0ef2bdf..7e1541f60 100644
--- a/test/pleroma/upload/filter/exiftool_test.exs
+++ b/test/pleroma/upload/filter/exiftool/strip_location_test.exs
@@ -2,7 +2,7 @@
 # Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.Upload.Filter.ExiftoolTest do
+defmodule Pleroma.Upload.Filter.Exiftool.StripLocationTest do
   use Pleroma.DataCase, async: true
   alias Pleroma.Upload.Filter
 
@@ -21,7 +21,7 @@ test "apply exiftool filter" do
       tempfile: Path.absname("test/fixtures/DSCN0010_tmp.jpg")
     }
 
-    assert Filter.Exiftool.filter(upload) == {:ok, :filtered}
+    assert Filter.Exiftool.StripLocation.filter(upload) == {:ok, :filtered}
 
     {exif_original, 0} = System.cmd("exiftool", ["test/fixtures/DSCN0010.jpg"])
     {exif_filtered, 0} = System.cmd("exiftool", ["test/fixtures/DSCN0010_tmp.jpg"])
@@ -37,6 +37,6 @@ test "verify webp files are skipped" do
       content_type: "image/webp"
     }
 
-    assert Filter.Exiftool.filter(upload) == {:ok, :noop}
+    assert Filter.Exiftool.StripLocation.filter(upload) == {:ok, :noop}
   end
 end
diff --git a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
index b07011b76..9a17e277e 100644
--- a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
+++ b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
@@ -27,6 +27,46 @@ test "works with honkerific attachments" do
       assert attachment.mediaType == "application/octet-stream"
     end
 
+    test "works with an unknown but valid mime type" do
+      attachment = %{
+        "mediaType" => "x-custom/x-type",
+        "type" => "Document",
+        "url" => "https://example.org"
+      }
+
+      assert {:ok, attachment} =
+               AttachmentValidator.cast_and_validate(attachment)
+               |> Ecto.Changeset.apply_action(:insert)
+
+      assert attachment.mediaType == "x-custom/x-type"
+    end
+
+    test "works with invalid mime types" do
+      attachment = %{
+        "mediaType" => "x-customx-type",
+        "type" => "Document",
+        "url" => "https://example.org"
+      }
+
+      assert {:ok, attachment} =
+               AttachmentValidator.cast_and_validate(attachment)
+               |> Ecto.Changeset.apply_action(:insert)
+
+      assert attachment.mediaType == "application/octet-stream"
+
+      attachment = %{
+        "mediaType" => "https://example.org",
+        "type" => "Document",
+        "url" => "https://example.org"
+      }
+
+      assert {:ok, attachment} =
+               AttachmentValidator.cast_and_validate(attachment)
+               |> Ecto.Changeset.apply_action(:insert)
+
+      assert attachment.mediaType == "application/octet-stream"
+    end
+
     test "it turns mastodon attachments into our attachments" do
       attachment = %{
         "url" =>
diff --git a/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs b/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs
new file mode 100644
index 000000000..5b8148c05
--- /dev/null
+++ b/test/pleroma/web/admin_api/controllers/announcement_controller_test.exs
@@ -0,0 +1,281 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.AnnouncementControllerTest do
+  use Pleroma.Web.ConnCase
+
+  import Pleroma.Factory
+
+  setup do
+    admin = insert(:user, is_admin: true)
+    token = insert(:oauth_admin_token, user: admin)
+
+    conn =
+      build_conn()
+      |> assign(:user, admin)
+      |> assign(:token, token)
+
+    {:ok, %{admin: admin, token: token, conn: conn}}
+  end
+
+  describe "GET /api/v1/pleroma/admin/announcements" do
+    test "it lists all announcements", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [%{"id" => ^id}] = response
+    end
+
+    test "it paginates announcements", %{conn: conn} do
+      _announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
+
+      response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert length(response) == 20
+    end
+
+    test "it paginates announcements with custom params", %{conn: conn} do
+      announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
+
+      response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements", limit: 5, offset: 7)
+        |> json_response_and_validate_schema(:ok)
+
+      assert length(response) == 5
+      assert Enum.at(response, 0)["id"] == Enum.at(announcements, 7).id
+    end
+
+    test "it returns empty list with out-of-bounds offset", %{conn: conn} do
+      _announcements = Enum.map(0..20, fn _ -> insert(:announcement) end)
+
+      response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements", offset: 21)
+        |> json_response_and_validate_schema(:ok)
+
+      assert [] = response
+    end
+
+    test "it rejects invalid pagination params", %{conn: conn} do
+      conn
+      |> get("/api/v1/pleroma/admin/announcements", limit: 0)
+      |> json_response_and_validate_schema(400)
+
+      conn
+      |> get("/api/v1/pleroma/admin/announcements", limit: -1)
+      |> json_response_and_validate_schema(400)
+
+      conn
+      |> get("/api/v1/pleroma/admin/announcements", offset: -1)
+      |> json_response_and_validate_schema(400)
+    end
+  end
+
+  describe "GET /api/v1/pleroma/admin/announcements/:id" do
+    test "it displays one announcement", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements/#{id}")
+        |> json_response_and_validate_schema(:ok)
+
+      assert %{"id" => ^id} = response
+    end
+
+    test "it returns not found for non-existent id", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> get("/api/v1/pleroma/admin/announcements/#{id}xxx")
+        |> json_response_and_validate_schema(:not_found)
+    end
+  end
+
+  describe "DELETE /api/v1/pleroma/admin/announcements/:id" do
+    test "it deletes specified announcement", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> delete("/api/v1/pleroma/admin/announcements/#{id}")
+        |> json_response_and_validate_schema(:ok)
+    end
+
+    test "it returns not found for non-existent id", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> delete("/api/v1/pleroma/admin/announcements/#{id}xxx")
+        |> json_response_and_validate_schema(:not_found)
+
+      assert %{id: ^id} = Pleroma.Announcement.get_by_id(id)
+    end
+  end
+
+  describe "PATCH /api/v1/pleroma/admin/announcements/:id" do
+    test "it returns not found for non-existent id", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/admin/announcements/#{id}xxx", %{})
+        |> json_response_and_validate_schema(:not_found)
+
+      assert %{id: ^id} = Pleroma.Announcement.get_by_id(id)
+    end
+
+    test "it updates a field", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      starts_at = NaiveDateTime.add(now, -10, :second)
+
+      _response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
+          starts_at: NaiveDateTime.to_iso8601(starts_at)
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      new = Pleroma.Announcement.get_by_id(id)
+
+      assert NaiveDateTime.compare(new.starts_at, starts_at) == :eq
+    end
+
+    test "it updates with time with utc timezone", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      now = DateTime.now("Etc/UTC") |> elem(1) |> DateTime.truncate(:second)
+      starts_at = DateTime.add(now, -10, :second)
+
+      _response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
+          starts_at: DateTime.to_iso8601(starts_at)
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      new = Pleroma.Announcement.get_by_id(id)
+
+      assert DateTime.compare(new.starts_at, starts_at) == :eq
+    end
+
+    test "it updates a data field", %{conn: conn} do
+      %{id: id} = announcement = insert(:announcement, data: %{"all_day" => true})
+
+      assert announcement.data["all_day"] == true
+
+      new_content = "new content"
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
+          content: new_content
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["content"] == new_content
+      assert response["all_day"] == true
+
+      new = Pleroma.Announcement.get_by_id(id)
+
+      assert new.data["content"] == new_content
+      assert new.data["all_day"] == true
+    end
+
+    test "it nullifies a nullable field", %{conn: conn} do
+      now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      starts_at = NaiveDateTime.add(now, -10, :second)
+
+      %{id: id} = insert(:announcement, starts_at: starts_at)
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> patch("/api/v1/pleroma/admin/announcements/#{id}", %{
+          starts_at: nil
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["starts_at"] == nil
+
+      new = Pleroma.Announcement.get_by_id(id)
+
+      assert new.starts_at == nil
+    end
+  end
+
+  describe "POST /api/v1/pleroma/admin/announcements" do
+    test "it creates an announcement", %{conn: conn} do
+      content = "test post announcement api"
+
+      now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
+      starts_at = NaiveDateTime.add(now, -10, :second)
+      ends_at = NaiveDateTime.add(now, 10, :second)
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/v1/pleroma/admin/announcements", %{
+          "content" => content,
+          "starts_at" => NaiveDateTime.to_iso8601(starts_at),
+          "ends_at" => NaiveDateTime.to_iso8601(ends_at),
+          "all_day" => true
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert %{"content" => ^content, "all_day" => true} = response
+
+      announcement = Pleroma.Announcement.get_by_id(response["id"])
+
+      assert not is_nil(announcement)
+
+      assert NaiveDateTime.compare(announcement.starts_at, starts_at) == :eq
+      assert NaiveDateTime.compare(announcement.ends_at, ends_at) == :eq
+    end
+
+    test "creating with time with utc timezones", %{conn: conn} do
+      content = "test post announcement api"
+
+      now = DateTime.now("Etc/UTC") |> elem(1) |> DateTime.truncate(:second)
+      starts_at = DateTime.add(now, -10, :second)
+      ends_at = DateTime.add(now, 10, :second)
+
+      response =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/v1/pleroma/admin/announcements", %{
+          "content" => content,
+          "starts_at" => DateTime.to_iso8601(starts_at),
+          "ends_at" => DateTime.to_iso8601(ends_at),
+          "all_day" => true
+        })
+        |> json_response_and_validate_schema(:ok)
+
+      assert %{"content" => ^content, "all_day" => true} = response
+
+      announcement = Pleroma.Announcement.get_by_id(response["id"])
+
+      assert not is_nil(announcement)
+
+      assert DateTime.compare(announcement.starts_at, starts_at) == :eq
+      assert DateTime.compare(announcement.ends_at, ends_at) == :eq
+    end
+  end
+end
diff --git a/test/pleroma/web/mastodon_api/controllers/announcement_controller_test.exs b/test/pleroma/web/mastodon_api/controllers/announcement_controller_test.exs
new file mode 100644
index 000000000..60c9978c2
--- /dev/null
+++ b/test/pleroma/web/mastodon_api/controllers/announcement_controller_test.exs
@@ -0,0 +1,169 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.AnnouncementControllerTest do
+  use Pleroma.Web.ConnCase
+
+  import Pleroma.Factory
+
+  alias Pleroma.Announcement
+  alias Pleroma.AnnouncementReadRelationship
+
+  describe "GET /api/v1/announcements" do
+    setup do
+      %{conn: conn} = oauth_access([])
+      {:ok, conn: conn}
+    end
+
+    test "it does not allow guests", %{conn: conn} do
+      _response =
+        conn
+        |> assign(:token, nil)
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:forbidden)
+    end
+
+    test "it allows users with scopes" do
+      %{conn: conn} = oauth_access(["read:accounts"])
+
+      _response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+    end
+
+    test "it lists all announcements", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [%{"id" => ^id}] = response
+    end
+
+    test "it returns time with utc timezone", %{conn: conn} do
+      start_time =
+        NaiveDateTime.utc_now()
+        |> NaiveDateTime.add(-999_999, :second)
+        |> NaiveDateTime.truncate(:second)
+
+      end_time =
+        NaiveDateTime.utc_now()
+        |> NaiveDateTime.add(999_999, :second)
+        |> NaiveDateTime.truncate(:second)
+
+      %{id: id} = insert(:announcement, %{starts_at: start_time, ends_at: end_time})
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [%{"id" => ^id}] = [announcement] = response
+
+      assert String.ends_with?(announcement["starts_at"], "Z")
+      assert String.ends_with?(announcement["ends_at"], "Z")
+    end
+
+    test "it does not list announcements starting after current time", %{conn: conn} do
+      time = NaiveDateTime.utc_now() |> NaiveDateTime.add(999_999, :second)
+      insert(:announcement, starts_at: time)
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [] = response
+    end
+
+    test "it does not list announcements ending before current time", %{conn: conn} do
+      time = NaiveDateTime.utc_now() |> NaiveDateTime.add(-999_999, :second)
+      insert(:announcement, ends_at: time)
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [] = response
+    end
+
+    test "when authenticated, also expose read property", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [%{"id" => ^id, "read" => false}] = response
+    end
+
+    test "when authenticated and announcement is read by user" do
+      %{id: id} = announcement = insert(:announcement)
+      user = insert(:user)
+
+      AnnouncementReadRelationship.mark_read(user, announcement)
+
+      %{conn: conn} = oauth_access(["read:accounts"], user: user)
+
+      response =
+        conn
+        |> get("/api/v1/announcements")
+        |> json_response_and_validate_schema(:ok)
+
+      assert [%{"id" => ^id, "read" => true}] = response
+    end
+  end
+
+  describe "POST /api/v1/announcements/:id/dismiss" do
+    setup do: oauth_access(["write:accounts"])
+
+    test "it requires auth", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> assign(:token, nil)
+        |> post("/api/v1/announcements/#{id}/dismiss")
+        |> json_response_and_validate_schema(:forbidden)
+    end
+
+    test "it requires write:accounts oauth scope" do
+      %{id: id} = insert(:announcement)
+
+      %{conn: conn} = oauth_access(["read:accounts"])
+
+      _response =
+        conn
+        |> post("/api/v1/announcements/#{id}/dismiss")
+        |> json_response_and_validate_schema(:forbidden)
+    end
+
+    test "it gives 404 for non-existent announcements", %{conn: conn} do
+      %{id: id} = insert(:announcement)
+
+      _response =
+        conn
+        |> post("/api/v1/announcements/#{id}xxx/dismiss")
+        |> json_response_and_validate_schema(:not_found)
+    end
+
+    test "it marks announcement as read", %{user: user, conn: conn} do
+      %{id: id} = announcement = insert(:announcement)
+
+      refute Announcement.read_by?(announcement, user)
+
+      _response =
+        conn
+        |> post("/api/v1/announcements/#{id}/dismiss")
+        |> json_response_and_validate_schema(:ok)
+
+      assert Announcement.read_by?(announcement, user)
+    end
+  end
+end
diff --git a/test/support/factory.ex b/test/support/factory.ex
index aaadae9bd..b01aff3ab 100644
--- a/test/support/factory.ex
+++ b/test/support/factory.ex
@@ -639,4 +639,16 @@ def filter_factory do
       context: ["home"]
     }
   end
+
+  def announcement_factory(params \\ %{}) do
+    data = Map.get(params, :data, %{})
+
+    {_, params} = Map.pop(params, :data)
+
+    %Pleroma.Announcement{
+      data: Map.merge(%{"content" => "test announcement", "all_day" => false}, data)
+    }
+    |> Map.merge(params)
+    |> Pleroma.Announcement.add_rendered_properties()
+  end
 end