Markdeep
Turns a plain text file into a rendered document with one script line.
Markdeep is a JavaScript library that renders markdown documents directly in the browser: append a single script line to a plain text file, open it, and it displays as a fully formatted document — no build tools, no server.
It extends markdown with ASCII-art diagrams that render as vector graphics, calendars, admonitions, and LaTeX math, making it beloved for technical specs and research notes.
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Try markdown before you install anything
The free online markdown editor gives you a live side-by-side preview in the browser — a quick way to test the syntax Markdeep uses, with nothing to download or sign up for.
Open the editor