Most markdown viewers skip your diagrams — the ```mermaid block that renders as a beautiful flowchart on GitHub shows up as a dead code snippet everywhere else. This one renders it. Click “Try a sample” to see it live.

What renders

Any fenced code block tagged mermaid becomes a live diagram: flowcharts, sequence diagrams, class and ER diagrams, state machines, Gantt charts, pie charts — the full Mermaid language, using the same Mermaid build the Read.md apps ship with. Click any rendered diagram to zoom it 1:1; click again to fit the page.

Graceful with broken diagrams

A typo in one diagram won't blank your document or dump a red syntax bomb into the page. Each diagram renders independently — if one fails, you get its source back as a code block with a small note, and the rest of the document (and the other diagrams) render normally. AI-generated markdown is full of almost-valid Mermaid; a viewer needs to survive it.

Why diagrams matter in markdown

Architecture docs, design reviews, LLM-generated research and plans — the interesting ones have diagrams. GitHub renders Mermaid in READMEs since 2022, so a growing share of .md files simply assume the reader supports it. If your viewer doesn't, you're reading half the document.

Same engine, every device

This page uses the identical rendering stack as the Read.md apps — so a diagram-heavy doc reads the same on this page, on your iPhone, on Android, or on your Mac:

Also see: the plain markdown viewer or open an .md file online.