LaTeX to PDF Online — Compile in Browser, No Overleaf

Why "LaTeX to PDF in the Browser" is a Big Deal

For 30 years the only ways to compile a LaTeX document have been:

Local install — TeX Live (3GB+), MiKTeX, MacTeX. Painful on first setup, painful to keep updated.

Overleaf — Brilliant for collaboration, but: requires account, your source goes to their servers, free tier is limited (1 collaborator, 60s compile timeout, basic features only), $12+/month for paid.

Quick online compilers — Most are 5-year-old hobby projects, slow, frequently down, and they upload your .tex source to a stranger's VPS.

There's a fourth option now: a full TeX distribution compiled to WebAssembly, running directly in your browser tab. That's what powers ExactPDF's LaTeX to PDF tool.

What It Can Do

Standard `pdflatex` and `xelatex` engines

AMS packages (`amsmath`, `amssymb`, `amsthm`, `mathtools`)

BibTeX and BibLaTeX with `biber`

TikZ + PGFPlots for diagrams and plots

`hyperref`, `cleveref`, `booktabs`, `siunitx`, `listings`, `minted` (with caveats)

Common journal classes — `article`, `report`, `book`, `IEEEtran`, `acmart`, `elsarticle`

Image inclusion — PNG, JPG, PDF figures via `graphicx`

What It Can't (Yet) Do

`shell-escape` (no calling external programs from inside TeX — security)

Live collaborative editing (use Overleaf if multiple authors)

Proprietary fonts not bundled in the WASM distribution (you can upload .ttf/.otf to include)

Beamer themes that depend on shell-escape

For 95% of academic papers, lab reports, theses, and CVs, the limits don't matter.

How It Works

Under the hood the tool ships:

A WASM-compiled TeX engine — a port of `pdflatex` to WebAssembly (~50MB on first download, cached after)

A texlive-essential package set — bundled in the WASM blob, no on-demand fetching of `.sty` files

An in-browser file system — your `.tex` source, included `.bib` files, and figures live in IndexedDB

A worker thread — compilation runs off the main thread so the UI stays responsive

When you click Compile:

Source flows into the WASM engine

Engine writes `.aux`, `.log`, `.toc`, `.bbl` to the virtual file system

Output `.pdf` is returned as a Blob

Tool renders the PDF inline using PDF.js + offers a Download button

Total time for a typical 10-page article with bibliography: 4–8 seconds on second compile (the first compile is slower because of warm-up).

Step-by-Step: Compile a LaTeX Document

Step 1: Open the tool

Go to LaTeX to PDF. On first visit the WASM engine downloads (~50MB) — this is a one-time cost.

Step 2: Paste or upload your .tex

Either paste source into the editor or upload a `.tex` file. For multi-file projects, upload a folder (the tool reads `.tex`, `.bib`, and image files).

Step 3: Choose engine

`pdflatex` for most documents. `xelatex` if you use system fonts or non-Latin scripts (CJK, Devanagari, Arabic).

Step 4: Click Compile

First compile generates the bibliography (`biber`), then runs `pdflatex` twice for cross-references. The log appears alongside the PDF preview.

Step 5: Download the PDF

Click Download. The file is generated entirely in-browser — there is no server round-trip.

Privacy: Why It Matters Even for "Just LaTeX"

LaTeX documents are often:

Unpublished research — you don't want it sitting on someone's server while you're still writing it

Patent drafts and disclosures — public exposure can invalidate patents

Confidential consulting reports

Theses with embargoed data

Internal company technical reports

NDA-protected work for clients

When you compile on Overleaf you're trusting Overleaf's security; when you compile on a "free LaTeX online" hobby site you're trusting an unknown VPS. Browser-based compilation removes the trust requirement entirely.

Comparison: ExactPDF vs Overleaf vs Local TeX

Feature	ExactPDF	Overleaf Free	Overleaf Pro	Local TeX Live
Cost	Free	Free	$12/mo	Free
Setup	None	Account	Account + payment	3GB install, 30 min
Source uploaded?	No	Yes	Yes	No
Collaboration	No	1 collaborator	Unlimited	None
Compile timeout	None (browser)	60s	240s	None
Works offline	Yes (after first load)	No	No	Yes
Package availability	Bundled essentials	Full TeX Live	Full TeX Live	Full TeX Live
Best for	Solo, private, quick	Class assignments	Co-authored papers	Power users

The honest read: Overleaf is unbeatable for collaborative writing, ExactPDF is unbeatable for solo private work, and local TeX Live is for power users who want full control.

Common Issues

Symptom	Cause	Fix
"Package X not found"	Niche package not bundled	Upload the .sty manually or switch to alternative package
Custom font not rendering	Need `xelatex` + font file	Switch engine to xelatex; upload .ttf via the file panel
Bibliography empty	Forgot to run biber	Tool now auto-runs biber → pdflatex × 2
Slow first compile	WASM engine downloading	One-time; subsequent compiles are fast
Out-of-memory error	500+ page document with lots of figures	Compile in sections or use local TeX Live for monsters

FAQ

Can I compile LaTeX to PDF without installing TeX Live?

Yes. ExactPDF runs a full TeX engine compiled to WebAssembly directly in your browser.

Does it support BibTeX, TikZ, and AMS packages?

Yes — the bundled distribution includes the standard texlive packages.

Is my LaTeX source uploaded anywhere?

No. Compilation happens entirely in the browser tab.

How does this compare to Overleaf?

Overleaf is better for collaboration (paid). ExactPDF is better for fast, private, solo compiles (free).

Does it work offline?

Yes — once the WASM engine downloads, compilation works fully offline.

Try LaTeX to PDF — Free, In Browser →