markdownlint
A Node.js style checker and lint tool for Markdown/CommonMark files.
markdownlint-cli2
A fast, flexible, configuration-based command-line interface for linting Markdown/CommonMark files with the `markdownlint` library
@tinymd/md2json
A tiny, extendable markdown to JSON parser supporting custom elements. Integrates with build tools for React, Vue, and more. Works with CDN links for browser-based JavaScript.