markdown-diff

VS Code extension for visually comparing Markdown files with rendered HTML diffs — supports KaTeX, Mermaid, GitHub Alerts, footnotes, and more.

Side-by-side before/after comparison for any text: Markdown, HTML, live URLs and PDFs, with line- and word-level highlighting. Local-first web app (React, shadcn/ui, Tailwind) plus an agent-native CLI (JSON contract, semantic exit codes) for AI coding agents. PDF parsing via Firecrawl pdf-inspector.

A feature complete tool for managing documentations written in Markdown or MDX and generated via a specialized tool - e.g. Docusaurus