What is LibrePaper

LibrePaper is a free and open source platform for collaborative writing. Write with colleagues, collect comments on a published document, or connect an LLM agent to comment and edit.

The LibrePaper editor shows LaTeX source on the left and the compiled paper on the right, with its figure, equation and table.

Features

Writing:

  • Live preview of Markdown, HTML, Typst and LaTeX
  • Computational notebooks with Quarto and Calepin
  • Templates, tools and multi-file projects
  • Bibliographies from BibTeX and Zotero
  • Track changes: accept or reject each edit

Working with people:

  • Simultaneous editors, with named carets and personal undo
  • Highlights, suggested edits and threaded comments, live for everyone
  • Share with readers, commenters or editors, signed in with GitHub or Google
  • Chat with collaborators and AI agents
  • Named versions and track changes; owners can permanently trim older history

LLM agents:

  • Bring your own agent: no new subscription
  • Ask for changes in the sidebar chat
  • Pre-specified tasks on a selected passage
  • Reader, commenter or editor permissions
  • LibrePaper never sees your keys or tokens
  • Any commercial model or local weights, over MCP

Free and open:

  • Everything is free: no gated features
  • Open source server, reader and renderers
  • Public host at librepaper.org: 50 MB of storage per user and 30 uploads per hour
  • Self-host with one static binary and a Postgres database, on a laptop or a small server
  • Export project source and assets as ordinary files from the CLI
  • Back up every project in an account to local ZIP files with the companion