remark is a popular tool that transforms markdown with plugins. These plugins can inspect and change your markup. You can use remark on the server, the client, CLIs, deno, etc.

plugins to check (lint) markdown code style

Markdown component for React

remark plugin to support GFM (autolink literals, footnotes, strikethrough, tables, tasklists)

plugin that turns markdown into HTML to support rehype

remark and rehype plugins to support math

plugin to add support for serializing HTML

plugin to add break support, without needing spaces

Legacy plugin to add `id`s to headings — please use `rehype-slug`

Legacy plugin to transform to React — please use `remark-rehype` and `rehype-react` instead