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Paste your LaTeX source into the editor and see it rendered beside it, instantly. Math is typeset with KaTeX, so equations, fractions, matrices, aligned blocks, Greek letters, and the common AMS-math commands update in real time as you type. Document structure is rendered too — sections and subsections, itemize and enumerate lists, tables, figures with captions, and theorem-style environments. Everything runs locally in your browser: your .tex is never uploaded to a server.
This preview is built for quick checks while you write: does that equation compile, is the table shaped right, did the section numbering come out as expected. KaTeX covers the large majority of everyday math, and macros you define with \newcommandare expanded. It is not a full TeX engine, though — package-specific layout, custom document classes, bibliographies, and references that need multiple compile passes won’t match a real build. When you need a final, publication-ready PDF, export it from here (a Pro feature) or compile with a full TeX distribution such as TeX Live with latexmk, or Overleaf.
No — it's a fast, browser-based preview. Math is rendered with KaTeX and document structure with an HTML renderer, which is what makes it instant. For byte-exact output with full packages, bibliographies, and cross-references, export to PDF or use a full TeX distribution.
No. Rendering happens entirely in your browser. Your LaTeX source never leaves your device, so the preview works even with sensitive or unpublished drafts.
Everything KaTeX supports — fractions, matrices, aligned environments, big operators, Greek letters, and most AMS-math — plus any macros you define with \newcommand. Commands that need a full TeX engine or extra packages may not render.
No. The live preview is free and needs no signup. PDF export is part of the optional Pro plan, but previewing your document is always free.