MojoPad typesets LaTeX math anywhere in a note, using KaTeX — inline formulas and full display equations. Like everything else, it runs entirely on your Mac, fonts and all — no account, no server, no internet.
Wrap an expression in single dollar signs for inline math — $e^{i\pi}+1=0$
renders right in your sentence — and double dollar signs for a centered block equation:
$$
\int_0^\infty x^2\,dx = \frac{x^3}{3}
$$An inline formula typesets the moment you type the closing dollar sign, wherever you're writing — a rich-text page, a Markdown page, or a bullet on an outline. You don't have to leave the sentence, reload, or switch views to see it.
MojoPad is careful about what counts as math: everyday prices like “it costs $5 and $10” stay plain text. A closing dollar sign has to sit tight against the formula, and can't be followed by a digit — so prose about money is never mistaken for an equation. If you did mean the dollar signs literally, press ⌘Z once and the text comes back exactly as you typed it.
The / menu also has Equation (a block) and Inline math to drop one in without typing the dollar signs yourself.
Click a block equation to open its editor — the LaTeX on top, a live preview below — then press Escape, ⌘Return, or Done to close it. Click an inline formula to edit its LaTeX in a quick box. A mistake renders in red, right where it is, so you can fix it in place.
When you clip or import a page that has equations — a Wikipedia article, a paper, a reference page — MojoPad captures the real math and rebuilds it as live, crisp formulas in your note, instead of dropping it or leaving a fuzzy image. The equations are then yours to edit like any other, and they travel into your exports the same way.
On Markdown pages, math is simply $…$ and $$…$$ in the source, so it
round-trips cleanly and stays readable as plain text. And it's baked into your exports: equations
appear correctly in your PDF, HTML, and static-site exports (with the fonts embedded, so they
work offline anywhere), and as MathML in ePub — so they render in your e-reader too.