From the creator of Overleaf

Next-gen LaTeX tooling.

LaTeX rewritten. Drop-in compatible with pdfTeX, XeTeX and LuaTeX.

main.texmacros.texrefs.bib

\documentclass{article}\usepackage{amsmath, macros}\begin{document}\section{Speed}Edits recompile in milliseconds.\begin{equation} \norm{x}^2 = \sum_i x_i^2\end{equation}\end{document}

Speed

Edits recompile in milliseconds. The engine stays warm between saves and resumes from a checkpoint, so only the changed page is typeset again. Nothing else moves.

∥x∥² = ∑_i x_i² (1)

The runtime and the editor are separate things. Either one works without the other.

compiled38 mswarm · 1 pass

Placeholder · video not recorded yet1:48There is no video yet.Placeholder player. Poster is a mock-up.

Demo: edit, save, PDF. 1:48.placeholder

Talk to me.

henry@voltlatex.com

Three parts

Runtime, editor, server. Take what you need.

$ volt

The LaTeX runtime and package manager.

Runtime · CLI

✎ volt-editor

A LaTeX editor built on the volt engine.

Editor

⇋ volt-collab-server

People and AI editing the same document, in real time.

Collaboration and AI

01 — Speed

Recompiles you don't wait for.

Recompile after an edit · pdfLaTeX · 9 real papers

Measured

TikZ Feynhand36.5× faster
0.092 s
3.363 s
GPT-311.9× faster
0.723 s
8.608 s
ResNet11.8× faster
0.063 s
0.743 s
Attention11.1× faster
0.093 s
1.029 s
Diffusion10× faster
0.233 s
2.320 s
Étale sums5.6× faster
0.101 s
0.559 s
Gemini 1.55.1× faster
0.790 s
4.033 s
Latent diffusion3.4× faster
0.691 s
2.343 s
LLM survey1.5× faster
1.454 s
2.128 s

Wall-clock seconds, median of three, with dirty (edited) TeX files and volt's watch mode (-w) enabled; stock is TeX Live 2025 pdfLaTeX via latexmk.

02 — The CLI

One binary. No TeX Live install.

~/thesis

$ volt init
$ volt build -w
volt  main.tex -> build/main.pdf
  pass 1  engine  cold (first compile)  4.12s
ok  1 pass  4.12s
[volt watch] changed: main.tex
  pass 1  engine  warm                  0.04s
ok  1 pass  0.04s
$ volt lock
$ volt build --frozen # offline, pinned

volt initWrite a minimal volt.toml.
volt build [-w]Build. -w recompiles on save.
volt lockPin a cold build into volt.lock.
volt fetchDownload everything the lock needs.
volt exportExport the locked project.
volt cachedir, clean or prune.
volt toolpdftex, bibtex, makeindex, latexmk.

--locked--offline--frozen--output-format=json--limit-time=S-C DIR

03 — Errors

Errors that make sense. To you and your AI.

Volt traces every error back to your line, explains it in plain English, and shows the fix. Even when it breaks deep inside a package.

Stock TeX

main.log

! Package siunitx Error: Duplicate per part.

See the siunitx package documentation for explanation.
Type  H <return>  for immediate help.
 ...

\__siunitx_unit_parse_add:nnnn #1#2#3#4
    ->...\msg_error:nnxx {siunitx}{duplicate-part}
\__siunitx_unit_parse:n ...
l.42 ...ion is \qty{9.81}{\metre\per\per
                                        \second}
? h
Each unit may have only one per:
the additional per part '\per' will be ignored.

Volt

main.tex

Errorsiunitxsiunitx-duplicate-part

A unit repeats the same part

\qty{9.81}{…}main.tex:42
\qtysiunitx.sty:9163
\siunitx_quantity:nnsiunitx.sty:7880
\__siunitx_unit_parse:nsiunitx.sty:6953
\__siunitx_unit_parse_add:nnnnsiunitx.sty:6966

CauseThe unit repeats the \per part.

FixKeep a single \per part in the unit.

Broken\unit{\per\per\second}

Fixed\unit{\per\second}

Learn more

281 errors, rewritten in plain English

TeX itself and the packages you use, each with the cause, the fix and an example.

! Missing $ inserted.Math-only command used in text mode
! Undefined control sequence.Undefined control sequence: \textbff. Did you mean \textbf?
Package cleveref Error: cleveref must be loaded after hyperref!cleveref was loaded before hyperref Quick fix: move cleveref after hyperref
Package hyperref Warning: Ignoring empty anchorA hyperref anchor command received an empty destination name

Clear errors help AI too.

Agents get TeX's original error and Volt's explanation together: your exact line, the macro trace and the fix. No log to guess from, so they fix it first time.

What your AI sees

{
  "tex": "! Package siunitx Error: Duplicate per part.",
  "code": "siunitx-duplicate-part",
  "at": "main.tex:42",
  "error": "A unit repeats the same part",
  "trace": ["\qty", "\siunitx_quantity:nn", "\__siunitx_unit_parse:n"],
  "fix": "Keep a single \per part in the unit."
}

04 — The editor

Built on the compiler. Not a guess.

4.1

Definitions through macros

Jump to where a macro really came from, even when another macro defined it. Hover shows its origin.

main.tex

\textcolor

package xcolorloaded at main.tex:4

4.2

Rename through macros

Rename a label and every use follows, including uses hidden inside your own macros.

main.tex

4.3

Labels and refs

Complete a \ref from every file in the project. See what it resolves to.

main.tex

fig:speedFigure 1main.tex:23

fig:archFigure 2intro.tex:12

fig:cacheFigure 3cli.tex:40

05 — Profiler

Find out why it's slow. Macro by macro.

The first profiler for LaTeX. See which macros, and which parts of your document, cost compile time.

SummaryDiagnostics

Totals

6.42 sTotal

40Pages

1Pass

Phases

Phase	Time	Share
Typesetting	3,010 ms	46.9%
Package loading	1,180 ms	18.4%
Images	820 ms	12.8%
Output	770 ms	11.9%
Fonts	640 ms	10.0%

Hottest macros

\tikz@picture1,480 ms · 23.1% · 212 calls
\includegraphics820 ms · 12.8% · 31 calls
\pgfmathparse610 ms · 9.5% · 4,180 calls
\@makecaption290 ms · 4.5% · 58 calls
\sisetup240 ms · 3.7% · 96 calls

Hottest source regions

chapters/results.tex:118–1711,640 ms · 25.5%
chapters/method.tex:40–96910 ms · 14.2%
main.tex:3–31760 ms · 11.8%

Flame chart

main.tex · 6.42 spreamblechapters/method.texchapters/results.texappendix.texoutput\usepackage{tikz}\includegraphics\@makecaption\tikz@picture\includegraphics\tikz@picture\pgfmathparse

Example profile of a 40-page thesis. Illustrative values, not a measurement.

06 — Collaboration

Write together. People and AI, same document.

volt-collab-server keeps everyone in sync in volt-editor: collaborators, history and AI agents working on the same project.

main.tex

100% compatible with pdfTeX, XeTeX and LuaTeX.

Your existing documents build as they are. No rewrites, no new syntax.

Next-gen LaTeX tooling.

Runtime, editor, server. Take what you need.

$ volt

✎ volt-editor

⇋ volt-collab-server

Recompiles you don't wait for.

One binary. No TeX Live install.

Errors that make sense. To you and your AI.

A unit repeats the same part

281 errors, rewritten in plain English

Clear errors help AI too.

Built on the compiler. Not a guess.

Definitions through macros

Rename through macros

Labels and refs

Find out why it's slow. Macro by macro.

Write together. People and AI, same document.

100% compatible with pdfTeX, XeTeX and LuaTeX.

Hear when it's ready to try.