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ProseMirror
What it is
ProseMirror is a free, open-source toolkit for developers building rich-text editors on the web. It supports structured documents through a WYSIWYG-style interface, while allowing applications to define document shape and content. Rather than treating a document as an HTML blob, it gives application code control over a custom document data structure. Schemas and plugins support customization, while four core modules handle the document model, editor state, view, and transformations. Additional modules provide commands, key bindings, undo history, input macros, collaborative editing, and a basic schema. Multiple people can edit together in real time. Examples cover tasks such as Markdown editing, image uploads, custom schemas, menus, code editors, footnotes, and track changes. ProseMirror is legally free to use commercially, and installation is through npm. It can be self-hosted and works with recent Firefox, Chrome, Safari, and Edge versions, as well as Internet Explorer 11. It is a modular toolkit, not a ready-made editor component; implementation generally involves a bundler. The project points questions to its forum and bug reports to its issue tracker, and its GitHub repository says development has moved to Forgejo.
For and against
For
- Free for commercial use.
- Supports structured, customizable documents.
- Includes real-time collaborative editing.
- Plugin system supports extensions.
- Works with several major browsers.
Against
- Not a ready-made editor component.
- Implementation generally involves a bundler.
- GitHub repository says development moved to Forgejo.
- A forum advisory reports an XSS risk in some DOMSerializer uses.
The verdict
ProseMirror gives developers detailed control over document structure and editor behavior, including real-time collaboration. It requires implementation work, and developers should note the project’s stated repository move and the reported DOMSerializer security advisory.
Who it suits
ProseMirror suits developers who need to build a customized rich-text editor with structured documents. It is a fit for projects that can implement and bundle a modular toolkit rather than use a ready-made component.
Plans and prices
ProseMirror open-source library
commercial use legally permitted · install with npm
Read 1 Oct 2026 · prosemirror.net
On the record
- Account security
- The discussion site's terms make account holders responsible for maintaining account security and activity under their accounts.discuss.prosemirror.net · read 1 Oct 2026
- Architecture
- ProseMirror is modular, pluggable, largely functional and immutable, and unopinionated.prosemirror.net · read 1 Oct 2026
- Browser support
- The library works on recent Firefox, Chrome, Safari, and Edge versions, as well as Internet Explorer 11.prosemirror.net · read 1 Oct 2026
- Bundling
- ProseMirror is not distributed as one browser-loadable script, so the guide says users will probably want a bundler.prosemirror.net · read 1 Oct 2026
- Collaboration
- It supports real-time collaborative editing, allowing multiple people to edit the same document simultaneously.prosemirror.net · read 1 Oct 2026
- Commercial use
- The project is open source and legally free to use commercially, while asking profitable users to help fund maintenance.prosemirror.net · read 1 Oct 2026
- Core
- The core library is small and generic and is intended as a base for different kinds of editors.prosemirror.net · read 1 Oct 2026
- Core modules
- Four essential modules are prosemirror-model, prosemirror-state, prosemirror-view, and prosemirror-transform.prosemirror.net · read 1 Oct 2026
- Document model
- The editor gives application code control over a custom document data structure rather than treating the document as an HTML blob.prosemirror.net · read 1 Oct 2026
- Editing model
- It provides a WYSIWYG-style interface for documents with constrained, structured content.prosemirror.net · read 1 Oct 2026
- Examples
- Official examples cover Markdown editing, image upload, custom schemas, menus, foldable nodes, code editors, linters, footnotes, track changes, and collaborative editing.prosemirror.net · read 1 Oct 2026
- Extensions
- Additional modules provide editing commands, key bindings, undo history, input macros, collaborative editing, and a basic document schema.prosemirror.net · read 1 Oct 2026
- Implementation limit
- The core library is not a drop-in component and is intended as a modular, customizable toolkit; using it generally involves a bundler.prosemirror.net · read 1 Oct 2026
- Installation
- The official site says the easiest way to install ProseMirror is with npm.prosemirror.net · read 1 Oct 2026
- License
- The project is released under the MIT license and the homepage says users are legally free to use it commercially.github.com · read 1 Oct 2026
- License terms
- The ProseMirror state package is released under the MIT License, which includes warranty and liability disclaimers.github.com · read 1 Oct 2026
- Modularity
- Its modular architecture lets applications load only the code they need and replace system parts.prosemirror.net · read 1 Oct 2026
- Plugins
- Its plugin system enables additional functionality and custom extensions.prosemirror.net · read 1 Oct 2026
