Every few weeks I need to hand a Markdown document to someone who doesn't live in a text editor. A README for a client, meeting notes, a short spec with a couple of diagrams. And every time, the same two problems showed up:
Anything beyond plain GFM breaks. The moment a document contains a Mermaid diagram or LaTeX math, a lot of the converters I tried give up. You get a code fence where a flowchart should be, or raw $...$ soup in the middle of a paragraph.
The documents I convert are the ones I least want to upload. Internal notes, drafts, client material. A lot of online converters process your files on their servers, and for work documents that always made me uncomfortable.
So I built a small tool that fixes both for me: a free md ↔ html converter that runs entirely in your browser. No install, no sign-up, and your files are never uploaded — conversion happens client-side.
What it does
