no server · no upload · one file
This page renders a Markdown file from your own disk. The text is parsed here, in the tab, by about 300 lines of JavaScript — there is nothing to install and nowhere for the file to go.
Keep this file on your desktop and set it as the default app for .md, or drag files onto
it whenever you need to read one. Images and links that sit next to this file will resolve; ones
elsewhere on disk will not. Code fenced as mermaid renders as a diagram — the one
thing fetched from a CDN, on first use; offline you see the source instead.