A free platform to read, write, and review together.

HTML LaTeX Typst Markdown Quarto Calepin

A blue Olivetti typewriter, a plant and a notebook on a wooden desk. Photograph by Annie Spratt, from Pixabay.

Write

Free

People

Agents

Write

  • Live preview: Markdown, HTML, Typst and LaTeX
  • Computational notebooks: Quarto and Calepin
  • Authoring: templates, tools, and multi-file projects
  • Bibliographies: BibTeX and Zotero
  • Track changes: accept or reject each edit
The LibrePaper editor: LaTeX source on the left, the compiled paper with its figure, equation and table on the right.

Free

  • Everything is free: no gated features
  • Open source: server, reader and renderers
  • Public host: 100 MB free at librepaper.org
  • Self-host: one binary and a Postgres DB
  • Export: projects and comments as ordinary files

People

  • Simultaneous editors: named carets and personal undo
  • Annotate: highlights and threaded comments
  • Share: readers, commenters or editors
  • Chat: with collaborators and AI agents
  • History: granular and infinite
A comment thread in LibrePaper: three messages between two collaborators, with buttons to resolve, delete and reply.

Agents

  • Bring your own agent: no new subscription
  • Chat interface: ask for changes in the sidebar
  • Pre-specified tasks: pick one with a passage selected
  • Permissions: reader, commenter, or editor
  • Private: LibrePaper doesn't need your keys or tokens
  • MCP: any commercial model or local weights