NewLexiq Writer is live

Write the paper.Skip the compile queue.

Lexiq makes tools for serious writing. The first one, Lexiq Writer, is a collaborative LaTeX editor. The TeX engine runs in your browser, and the AI co-author knows what \begin{align} means.

Start writing, free See what it does

No credit card. Nothing to install. Compiles never time out.

Made for writing things like

  • PhD theses
  • NeurIPS rebuttals at 3 a.m.
  • Grant proposals
  • Lecture notes
  • Problem sets
  • Beamer talks
  • A very long appendix
  • Camera-ready versions
  • Résumés that kern properly
  • Lab reports
  • Textbooks
  • Referee responses
  • Love letters in \LaTeX
  • Math olympiad solutions
  • arXiv preprints
  • That one paper from 2019

Lexiq Writer

Everything a paper needs.
Nothing it doesn’t.

All the parts of Overleaf you liked. None of the spinning wheel. Plus a few things you didn’t know you wanted.

$ Load TeX engine (cached)
$ pdflatex main.tex
$ bibtex main
$ pdflatex (rerun for refs)
Lexiq, on your laptop0.41s
Somebody's shared serverqueued…

No compile quotas. No timeouts. Your drafts never leave your machine to be built.

The compiler lives in your browser

A full TeX Live engine, compiled to WebAssembly, runs on your own machine. pdfLaTeX, XeLaTeX, BibTeX and thousands of packages, fetched when you need them.

Write together, live

Cursors, presence, comments, chat, and suggest mode. It feels like a shared doc, except the output is typeset.

As shown in Table~\ref{tab:results}, our method
Tabto accept Claude
Fix this error Find a real citation Whiteboard → LaTeX ⌘K rewrite

An AI co-author who read the manual

Bring your own Claude key. It fixes compile errors, finds citations that actually exist (via Crossref), and turns a photo of a whiteboard into LaTeX.

\section{Method}
We train on 12 GPUs.
\begin{figure}
\includegraphics{loss}
\end{figure}
Results are in Tab.~1.

Click the PDF, land on the line

Two-way SyncTeX. Double-click a word in the PDF to jump to its source, or jump from code to the exact spot on the page.

  1. First draft

    Mar 2 · restore

  2. Advisor comments (47)

    Mar 9 · restore

  3. Rewrote the intro. Again.

    Apr 1 · restore

  4. Submitted to NeurIPS

    May 15 · restore

Every version, kept

Automatic history with diffs and one-click restore. Label the ones that matter.

fix: typo in eq. (3)
Add ablation table
Respond to reviewer 2

Git, if you’re into that

Push and pull with GitHub, import a repo, or export a clean .zip. Overleaf projects come across in one click.

Offline · 3 edits saved locally

Works on a plane

Keep writing offline. Everything syncs when you land, and nothing conflicts.

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 learning rate \alpha is set to 0.01.
+The learning rate $\alpha$ is set to 0.01.

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.

Typeset
eiπ+1=0e^{i\pi} + 1 = 0
✓ Typeset in 0.37 ms

Why Lexiq

Writing a paper is hard enough. The tools shouldn’t make it harder. We think the software around serious writing should be fast, private by default, lovely to look at, and free to start. So we’re building it, one instrument at a time. Writer is the first.

0.0s

Warm recompile, measured on an ordinary laptop.

0

Compile servers between you and your PDF. Your drafts stay on your machine.

$0

To start. The expensive part runs in your browser, so we can keep it that way.

The workshop

One workshop. Many instruments.

Lexiq is a family of tools for people who write things that matter. Each one does one job very well, and they all get along.

Available now

Lexiq Writer

Collaborative LaTeX with in-browser compilation, real-time co-editing, Git sync, and an AI co-author.

writer.lexiq.app

On the bench

The next instrument

We’ll tell you when it’s sharp. It’s going to be good.

\begin{your-next-paper}

Stop waiting on the compiler. Start writing.

Free to start. Your first PDF is about a minute away.

Start writing, free Browse templates

\end{procrastination}