LaTeX that compilesbefore you blink.
A collaborative LaTeX editor with the whole TeX engine running in your browser. Write with co-authors in real time, read errors in plain English, and bring Claude along as a co-author.
No credit card. Nothing to install. Compiles never time out.
Speaks your packages
- pdfLaTeX
- XeLaTeX
- BibTeX
- makeindex
- SyncTeX
- TikZ
- pgfplots
- amsmath
- booktabs
- Beamer
- IEEEtran
- moderncv
- biblatex
- hyperref
- siunitx
- cleveref
- natbib
- fontspec
Features
Everything a paper needs.
Nothing it doesn’t.
Seven things Writer does well, from the first \documentclass to the camera-ready PDF.
01 Compile
The compiler lives in your browser.
TeX Live, compiled to WebAssembly, runs on your own machine. There are no queues, no quotas and no timeouts, and your drafts never leave your laptop to be built.
- pdfLaTeX and XeLaTeX, with BibTeX and makeindex
- Packages download on demand, then stay cached
- Auto-compile as you type, or on ⌘S
No compile quotas. No timeouts. Your drafts never leave your machine to be built.
02 Collaborate
Write together, live.
Everyone sees each other’s cursors, by name. Leave comments on the exact sentence, propose edits in suggest mode, and keep the conversation in project chat.
- Owner, editor, commenter and viewer roles
- Suggestions with accept and reject
- Share by email invite or link
03 AI co-author
A co-author who read the manual.
Bring your own Claude key, or any OpenAI-compatible provider. It sees your whole project, and every edit it makes arrives as a diff you approve.
- Ghost-text completions, accepted with Tab
- ⌘K rewrites with a word-level diff
- Real citations from Crossref, and image → LaTeX
04 PDF
Click the PDF, land on the line.
Two-way SyncTeX. Double-click anywhere in the PDF to jump to its source, or send your cursor’s line to the exact spot on the page.
- Double-click PDF → source
- ⌥⇧L source → PDF
- Dark-mode PDF, zoom, page jump
05 History
Every version, kept.
Writer snapshots your project as you work. Compare any version with today, restore one file or the whole project, and label the ones that matter.
- Automatic versions with per-file diffs
- One-click restore
- Labels that are kept forever
First draft
Mar 2 · restore
Advisor comments (47)
Mar 9 · restore
Rewrote the intro. Again.
Apr 1 · restore
Submitted to NeurIPS
May 15 · restore
06 Git & import
Git, if you’re into that.
Link a GitHub repository and push or pull from the editor. Moving from Overleaf or arXiv? Bring the .zip and keep going.
- Push, pull and import from GitHub
- Overleaf and arXiv .zip import
- Clean .zip export at any time
07 Offline
Works on a plane.
Projects are saved on your device as you type. Lose the connection and keep writing; everything merges when you’re back, without conflicts.
- Local-first storage
- Conflict-free merging
- Clear online and offline status
Error messages, translated
We speak fluent TeX error.
TeX’s error messages were written in 1978, and it shows. Writer turns them into plain English, points at the line, and can fix it for you.
What TeX says
! Missing $ inserted.<inserted text>$l.42 The learning rate \alpha{} is set to 0.01.
What Lexiq says
Line 42: \alpha only works in math mode. Wrap it in dollar signs and TeX will stop yelling.
The small things
Small things, done right.
The details you’d build yourself if you had a free weekend. We did it for you.
Command palette
Every action, one keystroke away.
Quick open ⌘P
Jump to any file by name.
Vim & Emacs
Keep your muscle memory.
Visual mode
Live math and headings, right in the source.
Table builder
Paste from a spreadsheet, get booktabs.
Symbol palette
Find \varpi without Googling it.
Outline
Your document’s structure, clickable.
Split editor
Two files side by side, drag tabs between.
Zotero & Mendeley
Sync your library into your .bib.
Word count
For the abstract with a 250-word limit.
Dark mode
Editor, UI and even the PDF.
Works on your phone
Fix a typo from the conference hallway.
Templates
Don’t start from \documentclass.
Start from a paper, a thesis, a talk or a CV that already compiles.
Starter
Blank document
An empty article: a clean starting point.
Academic
Research article
Sections, figures, tables, equations, cross-references and a BibTeX bibliography.
Academic
Thesis / report
Multi-file report with chapters, table of contents and front matter.
Presentation
Presentation (Beamer)
Slides with sections, columns, blocks and overlays.
Journal
IEEE conference paper
Two-column IEEEtran conference format.
Academic
TikZ figure
A standalone vector diagram drawn with TikZ.
Career
Curriculum vitae
A modern, one-page CV using moderncv.
Career
Formal letter
A cover letter or formal correspondence.
Teaching
Homework / problem set
Numbered problems and solutions with theorem environments.
Playground
Go on, type some math.
Edit the LaTeX below and watch it typeset as you type. This little demo runs KaTeX. Writer runs a real TeX engine, and it’s about this snappy.
FAQ
Questions, answered.
The things people ask us most. Anything else, ask the AI. It read the manual.
Yes. Unlimited projects, in-browser compiling and real-time collaboration with up to five people per project cost nothing. Paid plans add more collaborators and AI that works without your own key.
\begin{your-next-paper}
Stop waiting on the compiler. Start writing.
Free to start. Your first PDF is about a minute away.
\end{procrastination}