rsms/markdown-wasm

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1667 stars · 69 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

markdown-wasm is a very fast Markdown parser and HTML renderer compiled from C (based on md4c) to WebAssembly, compliant with the CommonMark specification. It ships as a zero-dependency ~31 kB gzipped npm package with a simple synchronous parse() API usable in Node.js, browsers, and ES module setups.

Use cases

• parse markdown source and convert it to HTML in the browser
• convert markdown files to HTML in Node.js
• render user-submitted markdown with embedded HTML disabled for safety
• need a CommonMark-compliant markdown parser that runs anywhere via WebAssembly
• high-throughput markdown-to-HTML conversion where performance matters
• get HTML output as a string or as UTF-8 bytes from markdown input

When to choose

• You need very fast markdown-to-HTML rendering with a tiny footprint (31 kB gzipped, zero dependencies)
• You want a CommonMark-compliant parser that works identically in Node.js and the browser through WebAssembly
• You prefer WASM's isolated memory and portability, plus a simple synchronous parse() API with optional byte-array output

When to avoid

• You need markdown extensions beyond CommonMark (e.g., footnotes, math, or syntax-specific flavors) that md4c flags do not cover
• You need an AST or token stream for custom transformations rather than direct HTML output
• You must avoid WebAssembly or need a pure-JavaScript implementation for your environment

Facets

library · maturity stable

parser parsers web-development developer-tools wasm browser cross-platform markdown commonmark md4c html-rendering zero-dependency npm-package high-performance nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="rsms/markdown-wasm")