Markdown is for drafts.
Markup is forever.

notmarkdown turns Markdown — Mermaid diagrams and LaTeX math and all — into self-contained HTML, PDF, and EPUB that render the same everywhere, with no server, no JavaScript, and no link left to rot.

$ git clone https://github.com/nfeldman/notmarkdown && cd notmarkdown && ./setup.sh
View on GitHub Read the docs

hydra.md

## The Kirby–Paris hydra

```mermaid
graph TD
  R((root)) --> A((h₁))
  R --> B((h₂))
```

Its ordinal is $\omega^\omega$, yet
every hydra dies.
mdexport

The Kirby–Paris hydra

rooth₁h₂

Its ordinal is ωω, yet every hydra dies.

Diagrams and equations become part of the document.

Self-contained

One file. No server, no JavaScript, no CDN. Open it in ten years and it looks identical.

Diagrams & math, baked in

Mermaid renders to SVG, LaTeX to MathML — right in the output. A broken diagram never corrupts the doc.

HTML, PDF, PDF/A, EPUB

One source, every durable format. Drag a folder onto the macOS app, or wire it into any pipeline.

Built on pandoc, typst, and mermaidx.