GFM + XSS sanitization, all in your browser
Markdown is a lightweight markup language by John Gruber (2004) that converts plain text to HTML. It's used in README files on GitHub, Slack messages, Discord, Notion, Reddit, Stack Overflow. This converter supports GitHub-Flavored Markdown (GFM) — tables, fenced code blocks, task lists and auto-links. Output is sanitized with DOMPurify against XSS.