Equation Editor — Write & Edit LaTeX in the Browser
Write LaTeX equations with a live KaTeX preview, fix the maths a PDF extraction got wrong, and drop formulas straight into table cells. Runs entirely in your browser — nothing is uploaded and the renderer is bundled, so it works offline.
What you can do
Live KaTeX preview as you type, with the actual parse error when the TeX will not compile
Symbol palette for fractions, roots, sums, integrals, matrices, cases and Greek letters
Inline cell maths — a table cell written as $…$ renders as a typeset formula
Edit equations extracted from a PDF and push the corrected LaTeX back to the source region
KaTeX is bundled, not loaded from a CDN — equations render offline