Be honest. How many evenings has LaTeX stolen from you?
TESSA is a free LaTeX studio that explains your errors in plain English, fixes them in one click, and lets you drag things right on the PDF. Everything stays on your computer.
It's 2 a.m. The deadline is at nine. The PDF won't build.
Every keystroke updates the PDF. Every mistake gets caught while you type, with the fix one click away.
! Undefined control sequence. l.2 \titmle{My Report}
This is exactly what TESSA does with your real documents. Go on, press the orange button.
\titmle looks like a typo of \title.
Forty errors and a log nobody can read?
Every error comes with an explanation and a fix. Press Fix all and TESSA repairs them and compiles again. Drag the slider to see it.
$ and \end{…}
BEFOREAFTER
An hour of \vspace to move one figure?
Press Ctrl L and move charts, images and text boxes where you want them. TESSA rewrites the LaTeX for you.
Was it \leq or \le? \frac or \dfrac?
Click Σ, type your math and watch the preview build as you go. Inside math, @a becomes \alpha and // a fraction.
Typing & and \\ for forty rows?
Paste cells from Excel and they become a booktabs table. Click inside any table to sort, add rows or change alignment in a grid.
Where was that command again?
Files, sections, labels, citations, snippets and every command, one fuzzy search away. Export to PDF, PNG or PowerPoint from the same box.
> commands · @ sections · # labelsNot convinced yet? Give it three minutes.
No sign-up, no email. Just the app doing its thing.
Never written a line of LaTeX?
The first time you open TESSA it asks your name, what you write, your colours and how much help you want. Change any of it later in Settings.
Fourteen short steps in a practice document: write, compile, equations, lists, tables, fixes and layout mode. TESSA notices when you've done each one.
Where does your thesis go when you press save?
TESSA has no servers, no account and no analytics. It only goes online to download a LaTeX package it doesn't have yet, and never sends your documents.
Read the full privacy policy.
Free for Windows 10 and 11. LaTeX comes built in; if you already have TeX Live or MiKTeX, TESSA uses them automatically.
Open a Command Prompt in your Downloads folder and run certutil -hashfile TESSA-Setup-3.0.0.exe SHA256. The result must match the line above.
TESSA isn't code-signed yet, so Windows may show "Windows protected your PC" the first time. Choose More info → Run anyway.
Yes. It's free to use for personal, school and commercial writing. Everything you create belongs to you.
No. TESSA ships with its own LaTeX engine and fetches packages the first time a document needs them. TeX Live or MiKTeX are used automatically if you have them.
Never. TESSA has no servers. It only connects to download LaTeX packages it doesn't have yet, or when you look up a reference by DOI.
No. TESSA is freeware: free to use, but it may not be modified, reverse engineered or resold. It's built on open-source components, which are listed in the third-party notices.
Windows 10 and 11, 64-bit. Use the installer, or the portable version if you can't install software on the computer.
Yes. The first-run setup tailors TESSA to beginners, and the optional 10-minute tour teaches the essentials by doing them.