HackMD
Real-time collaborative Markdown.
Draft shared technical notes in a browser with Markdown source beside a rendered preview. Live multi-user editing, comments, version history, and team permissions support reviews and shared knowledge. Templates, presentations, GitHub synchronization, math, and diagrams help teams keep technical documents close to their development workflow.
Product preview
See HackMD in action
What is HackMD best for?
HackMD is a freemium Markdown tool best suited to teams coauthoring and reviewing technical markdown in a hosted workspace. It is available as Web app on Web, and its source status is proprietary.
Verified editor profile
Reviewed September 27, 2026
MarkdownList independently checked these facts against the product, its official documentation, or its public source. Missing items mean not verified, not necessarily unsupported.
Editing experience
Markdown support
- Tables
- Task lists
Collaboration and history
- Real-time collaboration
- Comments
- Revision history
At a glance
- Pricing
- Freemium
- Source
- Proprietary
- Best for
- Teams coauthoring and reviewing technical Markdown in a hosted workspace
Availability
Platforms
Surfaces
Related tools
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Strata
Write and review shared Markdown documents with people and agents.
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Web app · AI agent plugin · CLI
Web · macOS · Windows · Linux · CLI