A fast, minimal Scala 3 Markdown parser.

What it is

io.github.edadma.markdown is a Scala 3 library that turns CommonMark text into HTML, an XML AST, or a structured Document you can walk yourself.

import io.github.edadma.markdown.*

renderToHTML("# Hello, CommonMark!\n\nThis is **bold**, *italic*, and `code`.")
// → "<h1>Hello, CommonMark!</h1>\n<p>This is <strong>bold</strong>, ..."

The full surface — config knobs, AST node types, custom renderers — is documented in Reference.

Why this one?

• 100 % CommonMark 0.31.2. Every one of the 652 spec tests passes on every platform. No “almost compliant” surprises.
• Cross-platform from one source. JVM, Scala.js, Scala Native — same API, no platform-specific deps. The npm package @edadma/markdown is just the linked Scala.js output with TypeScript typings on top.
• Lean. Zero runtime dependencies (cross_platform, logger, dllist are author’s own micro-libraries — no third-party transitive surface).
• Pluggable extensions. Tables, strikethrough, task list items, footnotes, math, callouts, smart punctuation, emoji, attribute spans, definition lists, doc-tags — opt in only what you need.
• AST access. When HTML isn’t what you want, parse to Document and walk the tree yourself. The same nodes drive HTML and XML emitters internally.

Cross-platform

652 / 652 CommonMark spec tests pass on every platform.

Try it live

The Dingus is a browser sandbox running this exact library — paste markdown in, see HTML come out, no install required.

Where to go next