diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 4cf959f2d8..ff351429e0 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -240,6 +240,13 @@ module ApplicationHelper
     EmojiFormatter.new(html, custom_emojis, other_options.merge(animate: prefers_autoplay?)).to_s
   end
 
+  def site_icon_path(type, size = '48')
+    icon = SiteUpload.find_by(var: type)
+    return nil unless icon
+
+    icon.file.url(size)
+  end
+
   private
 
   def storage_host_var
diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index cb37a52217..85b913cf80 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -37,6 +37,8 @@ class Form::AdminSettings
     status_page_url
     captcha_enabled
     authorized_fetch
+    app_icon
+    favicon
   ).freeze
 
   INTEGER_KEYS = %i(
@@ -63,6 +65,8 @@ class Form::AdminSettings
   UPLOAD_KEYS = %i(
     thumbnail
     mascot
+    app_icon
+    favicon
   ).freeze
 
   OVERRIDEN_SETTINGS = {
diff --git a/app/models/site_upload.rb b/app/models/site_upload.rb
index 03d472cdb2..b3926ec7ed 100644
--- a/app/models/site_upload.rb
+++ b/app/models/site_upload.rb
@@ -19,7 +19,15 @@
 class SiteUpload < ApplicationRecord
   include Attachmentable
 
+  FAVICON_SIZES = [16, 32, 48].freeze
+  APPLE_ICON_SIZES   = [57, 60, 72, 76, 114, 120, 144, 152, 167, 180, 1024].freeze
+  ANDROID_ICON_SIZES = [36, 48, 72, 96, 144, 192, 256, 384, 512].freeze
+
+  APP_ICON_SIZES = (APPLE_ICON_SIZES + ANDROID_ICON_SIZES).uniq.freeze
+
   STYLES = {
+    app_icon: APP_ICON_SIZES.each_with_object({}) { |size, hash| hash[size.to_s.to_sym] = "#{size}x#{size}#" }.freeze,
+    favicon: FAVICON_SIZES.each_with_object({}) { |size, hash| hash[size.to_s.to_sym] = "#{size}x#{size}#" }.freeze,
     thumbnail: {
       '@1x': {
         format: 'png',
diff --git a/app/serializers/manifest_serializer.rb b/app/serializers/manifest_serializer.rb
index 1c1f7d0ad5..759490228c 100644
--- a/app/serializers/manifest_serializer.rb
+++ b/app/serializers/manifest_serializer.rb
@@ -1,21 +1,10 @@
 # frozen_string_literal: true
 
 class ManifestSerializer < ActiveModel::Serializer
+  include ApplicationHelper
   include RoutingHelper
   include ActionView::Helpers::TextHelper
 
-  ICON_SIZES = %w(
-    36
-    48
-    72
-    96
-    144
-    192
-    256
-    384
-    512
-  ).freeze
-
   attributes :id, :name, :short_name,
              :icons, :theme_color, :background_color,
              :display, :start_url, :scope,
@@ -37,9 +26,12 @@ class ManifestSerializer < ActiveModel::Serializer
   end
 
   def icons
-    ICON_SIZES.map do |size|
+    SiteUpload::ANDROID_ICON_SIZES.map do |size|
+      src = site_icon_path('app_icon', size.to_i)
+      src = URI.join(root_url, src).to_s if src.present?
+
       {
-        src: frontend_asset_url("icons/android-chrome-#{size}x#{size}.png"),
+        src: src || frontend_asset_url("icons/android-chrome-#{size}x#{size}.png"),
         sizes: "#{size}x#{size}",
         type: 'image/png',
         purpose: 'any maskable',
diff --git a/app/views/admin/settings/branding/show.html.haml b/app/views/admin/settings/branding/show.html.haml
index 769c0dafe8..71aac5ead1 100644
--- a/app/views/admin/settings/branding/show.html.haml
+++ b/app/views/admin/settings/branding/show.html.haml
@@ -40,5 +40,33 @@
           = fa_icon 'trash fw'
           = t('admin.site_uploads.delete')
 
+  .fields-row
+    .fields-row__column.fields-row__column-6.fields-group
+      = f.input :favicon,
+                as: :file,
+                input_html: { accept: ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].join(',') },
+                wrapper: :with_block_label
+
+    .fields-row__column.fields-row__column-6.fields-group
+      - if @admin_settings.favicon.persisted?
+        = image_tag @admin_settings.favicon.file.url('48'), class: 'fields-group__thumbnail'
+        = link_to admin_site_upload_path(@admin_settings.favicon), data: { method: :delete }, class: 'link-button link-button--destructive' do
+          = fa_icon 'trash fw'
+          = t('admin.site_uploads.delete')
+
+  .fields-row
+    .fields-row__column.fields-row__column-6.fields-group
+      = f.input :app_icon,
+                as: :file,
+                input_html: { accept: ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].join(',') },
+                wrapper: :with_block_label
+
+    .fields-row__column.fields-row__column-6.fields-group
+      - if @admin_settings.app_icon.persisted?
+        = image_tag @admin_settings.app_icon.file.url('48'), class: 'fields-group__thumbnail'
+        = link_to admin_site_upload_path(@admin_settings.app_icon), data: { method: :delete }, class: 'link-button link-button--destructive' do
+          = fa_icon 'trash fw'
+          = t('admin.site_uploads.delete')
+
   .actions
     = f.button :button, t('generic.save_changes'), type: :submit
diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index 9d7669d685..56857b2b63 100755
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -11,13 +11,13 @@
     - if storage_host?
       %link{ rel: 'dns-prefetch', href: storage_host }/
 
-    %link{ rel: 'icon', href: '/favicon.ico', type: 'image/x-icon' }/
+    %link{ rel: 'icon', href: site_icon_path('favicon') || '/favicon.ico', type: 'image/x-icon' }/
 
-    - %w(16 32 48).each do |size|
-      %link{ rel: 'icon', sizes: "#{size}x#{size}", href: frontend_asset_path("icons/favicon-#{size}x#{size}.png"), type: 'image/png' }/
+    - SiteUpload::FAVICON_SIZES.each do |size|
+      %link{ rel: 'icon', sizes: "#{size}x#{size}", href: site_icon_path('favicon', size.to_i) || frontend_asset_path("icons/favicon-#{size}x#{size}.png"), type: 'image/png' }/
 
-    - %w(57 60 72 76 114 120 144 152 167 180 1024).each do |size|
-      %link{ rel: 'apple-touch-icon', sizes: "#{size}x#{size}", href: frontend_asset_path("icons/apple-touch-icon-#{size}x#{size}.png") }/
+    - SiteUpload::APPLE_ICON_SIZES.each do |size|
+      %link{ rel: 'apple-touch-icon', sizes: "#{size}x#{size}", href: site_icon_path('app_icon', size.to_i) || frontend_asset_path("icons/apple-touch-icon-#{size}x#{size}.png") }/
 
     %link{ rel: 'mask-icon', href: frontend_asset_path('images/logo-symbol-icon.svg'), color: '#6364FF' }/
     %link{ rel: 'manifest', href: manifest_path(format: :json) }/
diff --git a/config/locales/simple_form.en-GB.yml b/config/locales/simple_form.en-GB.yml
index f4668ccada..9aedac15f3 100644
--- a/config/locales/simple_form.en-GB.yml
+++ b/config/locales/simple_form.en-GB.yml
@@ -77,9 +77,12 @@ en-GB:
           warn: Hide the filtered content behind a warning mentioning the filter's title
       form_admin_settings:
         activity_api_enabled: Counts of locally published posts, active users, and new registrations in weekly buckets
+        app_icon: WEBP, PNG, GIF or JPG. Overrides the default app icon on mobile devices with a custom icon.
+        backups_retention_period: Keep generated user archives for the specified number of days.
         bootstrap_timeline_accounts: These accounts will be pinned to the top of new users' follow recommendations.
         closed_registrations_message: Displayed when sign-ups are closed
         custom_css: You can apply custom styles on the web version of Mastodon.
+        favicon: WEBP, PNG, GIF or JPG. Overrides the default Mastodon favicon with a custom icon.
         mascot: Overrides the illustration in the advanced web interface.
         peers_api_enabled: A list of domain names this server has encountered in the fediverse. No data is included here about whether you federate with a given server, just that your server knows about it. This is used by services that collect statistics on federation in a general sense.
         profile_directory: The profile directory lists all users who have opted-in to be discoverable.
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index 7304bdc22f..fdc9f61813 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -77,11 +77,13 @@ en:
           warn: Hide the filtered content behind a warning mentioning the filter's title
       form_admin_settings:
         activity_api_enabled: Counts of locally published posts, active users, and new registrations in weekly buckets
+        app_icon: WEBP, PNG, GIF or JPG. Overrides the default app icon on mobile devices with a custom icon.
         backups_retention_period: Users have the ability to generate archives of their posts to download later. When set to a positive value, these archives will be automatically deleted from your storage after the specified number of days.
         bootstrap_timeline_accounts: These accounts will be pinned to the top of new users' follow recommendations.
         closed_registrations_message: Displayed when sign-ups are closed
         content_cache_retention_period: All posts from other servers (including boosts and replies) will be deleted after the specified number of days, without regard to any local user interaction with those posts. This includes posts where a local user has marked it as bookmarks or favorites. Private mentions between users from different instances will also be lost and impossible to restore. Use of this setting is intended for special purpose instances and breaks many user expectations when implemented for general purpose use.
         custom_css: You can apply custom styles on the web version of Mastodon.
+        favicon: WEBP, PNG, GIF or JPG. Overrides the default Mastodon favicon with a custom icon.
         mascot: Overrides the illustration in the advanced web interface.
         media_cache_retention_period: Media files from posts made by remote users are cached on your server. When set to a positive value, media will be deleted after the specified number of days. If the media data is requested after it is deleted, it will be re-downloaded, if the source content is still available. Due to restrictions on how often link preview cards poll third-party sites, it is recommended to set this value to at least 14 days, or link preview cards will not be updated on demand before that time.
         peers_api_enabled: A list of domain names this server has encountered in the fediverse. No data is included here about whether you federate with a given server, just that your server knows about it. This is used by services that collect statistics on federation in a general sense.
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index 9330eb0dae..56501034b2 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -285,4 +285,28 @@ describe ApplicationHelper do
       end
     end
   end
+
+  describe '#site_icon_path' do
+    context 'when an icon exists' do
+      let!(:favicon) { Fabricate(:site_upload, var: 'favicon') }
+
+      it 'returns the URL of the icon' do
+        expect(helper.site_icon_path('favicon')).to eq(favicon.file.url('48'))
+      end
+
+      it 'returns the URL of the icon with size parameter' do
+        expect(helper.site_icon_path('favicon', 16)).to eq(favicon.file.url('16'))
+      end
+    end
+
+    context 'when an icon does not exist' do
+      it 'returns nil' do
+        expect(helper.site_icon_path('favicon')).to be_nil
+      end
+
+      it 'returns nil with size parameter' do
+        expect(helper.site_icon_path('favicon', 16)).to be_nil
+      end
+    end
+  end
 end