All extensions
Standard extensions
The following extensions are bundled together with Remirror:
AnnotationExtension
 Allows the annotation (or highlighting) of the content in your editor
BlockquoteExtension
 Makes regions of text appear as an indented quote to ensure it stands out
BoldExtension
 Makes the text under the cursor / or at the provided position range bold
CalloutExtension
 Makes regions of text stand out on a colour background with optional emoji prefix
CodeBlockExtension
 Adds code blocks to the editor. This differs to the CodeExtension, which provides code marks on inline text.
CodeExtension
 Makes the text under the cursor / or at the provided position range code
CollaborationExtension
 Adds collaborative functionality powered by prosemirror-collab
ColumnsExtension
 Add column support to the nodes
DocExtension
 The root node in your editor. Allows you to customise attributes and valid content.
DropCursorExtension
 Shows a line indicator for where the drop target will be
EmbedExtension
 Adds iframe-based embeds to your text editor.
EmojiExtension
 Adds emoji support
EntityReferenceExtension
 Allows you to reference external entities in the content of your editor.
EpicModeExtension
 Shows the editor in epic mode.
EventsExtension
 Listens to events which occur within the editor
FindExtension 
 Add find and replace functionality to your editor.
FontFamilyExtension
 Add a font family to the selected text
FontSizeExtension
 Add a font size to the selected text
GapCursorExtension
 This will capture clicks near and arrow-key-motion past places that don't have a normally selectable position nearby, and create a gap cursor selection for them.
HardBreakExtension
 Inserts a hardBreak <br /> tag into the editor
HeadingExtension
 Adds headings to the editor
HistoryExtension
 Provides undo and redo commands
HorizontalRuleExtension
 Adds a horizontal line <hr /> tag to the editor
ImageExtension
 Places images into the editor
ItalicExtension
 Makes the text under the cursor / or at the provided position range italic
LinkExtension
 Makes the text under the cursor / or at the provided position range link to another resource
ListExtension
 Adds ordered lists, unordered lists, and checklists to the editor
MarkdownExtension
 Transforms the ProseMirror content of your editor to markdown syntax
MentionAtomExtension
 Provides mentions as atom nodes which don't support editing once being inserted into the document
MentionExtension
 Provides mentions as nodes which support editing once being inserted into the document
NodeFormattingExtension
 Enables you to align, index and set the line-height of content in your editor
PlaceholderExtension
 Shows a configurable placeholder when the ProseMirror content of your editor is empty
StrikeExtension
 Makes the text under the cursor / or at the provided position range strike
SubExtension
 Adds a sub mark to the editor. This is used to mark inline text as a subscript snippet
SupExtension
 Adds a sup mark to the editor. This is used to mark inline text as a superscript snippet
TablesExtension
 Adds simple tables to the editor
TextCaseExtension
 Formatting for text casing in the editor
TextColorExtension
 Makes the text under the cursor / or at the provided position range have the specified color
TextHighlightExtension
 Add a highlight color to the selected text
TrailingNodeExtension
 Ensure that there's always a trailing paragraph at the end of the document
UnderlineExtension
 Makes the text under the cursor / or at the provided position range underline
WhitespaceExtension
 Manage whitespace characters within the editor
YjsExtension
 The recommended extension for creating a collaborative editor, powered by Yjs.
Additional extensions
The following extensions are not bundled with the remirror package, and must be installed manually.
CountExtension 
 Adds ability to count characters or words in your editor, and optionally highlight to a user when they have exceeded a specified limit.
FileExtension 
 Adds the ability to upload arbitrary files to the editor.
Community extensions
The following extensions are maintained by the community:
EntityExtension
 Stores all the data of an entity within the document itself
Did you create an extension and want to list it here as well? Please create a PR - or reach out on Discord.