Prism MD
The markdown reader for the AI era.
Open anything from ChatGPT, Claude, or Gemini and read it the way it was meant to be read.
Privacy-first
Your documents stay on your device by default.
No tracking
No ads, no third-party analytics cookies.
Works offline
Documents you opened stay readable without a connection.
Your data, yours
Export everything any time, delete in one click.
What's inside
Built for the way AI writes.
AI-aware import
Auto-detects exports from ChatGPT, Claude, Gemini, and more. Drag a file in or paste — Prism MD figures out the rest.
Beautiful rendering
Syntax highlighting for 190+ languages via highlight.js, LaTeX math with KaTeX, and live Mermaid diagrams. Typography tuned for long reading sessions.
Multi-model comparison
Run the same document through GPT, Claude, and Gemini side by side. Diff the output, pick the best line, save the merge.
Structured extraction
Pull action items, decisions, code snippets, links, and key points out of any document — deterministic or AI-assisted.
Offline-ready PWA
Installs to your home screen on Android, iOS, and desktop. Reads your library without a connection. Syncs when you reconnect.
Privacy-first storage
Documents live in your browser by default. Opt into encrypted cloud sync only if you want it. Your AI API keys never leave your device.
Why we built this
Most markdown apps were built for software documentation. We built Prism MD after looking at thousands of AI-generated documents and asking: what would make these delightful to read?
AI tools produce long, structured text — outlines, diagrams, code, math, citations. Most readers turn that into a wall of grey. We wanted typography that breathes, code that feels safe to copy, math that renders the way a journal article would.
And we wanted it private. Your conversations with AI are personal. They should not be the next thing trained on, sold, or leaked.
Who it's for
If you read AI output, you'll feel at home.
AI power users
Read your ChatGPT and Claude transcripts in a proper reader instead of a chat sidebar.
Developers
Review AI-generated PRs, code explanations, and architecture proposals with syntax that breathes.
Researchers & writers
Render LaTeX, citations, and long-form structured documents with Mermaid diagrams for arguments.
Students
Open AI-generated study guides, summaries, and notes with math that looks like math.
Privacy
Your documents are not the product.
- No ads, ever.
- No third-party tracking cookies or analytics.
- No training on your documents.
- Local-first storage by default; cloud sync is opt-in and encrypted.
- Export everything in one click. Delete your account and we wipe within 30 days.
Read the full privacy policy.
Pricing
Simple. Honest. No surprise charges.
Free
Forever free for solo use.
- Up to 10 cloud documents
- Full reader + editor
- Syntax, math, Mermaid
- Share links
- Version history
Pro
For people who live in AI tools all day.
- Unlimited cloud documents
- AI assistant (summarize, explain, chat)
- GitHub integration
- MCP server for Claude Desktop & Cursor
- Multi-model comparison
- Priority support
Subscriptions are managed on the web. Android users: open prismmd.app in your desktop browser to upgrade.
Roadmap
What's next.
- NowAndroid app on Google Play (closed testing)
- Q3iOS app with Sign in with Apple
- Q3Additional AI providers (Mistral, Llama)
- Q4Team workspaces with role-based access
- LaterPublic publishing with custom domains
FAQ
Common questions.
Is my data secure?
Yes. All traffic is HTTPS. Documents stay in your browser by default. If you opt into cloud sync, content is encrypted at rest. Passwords are bcrypt-hashed at 12 rounds. We passed an internal OWASP-MASVS audit at 38.5 / 40.
Does it work offline?
Yes. Prism MD is a Progressive Web App. Once installed, documents you have opened stay readable without a connection. New documents sync when you reconnect.
Does it work on Android / iOS?
Android: in closed testing on the Play Store. iOS: in active development, planned for Q3.
Can I use my own AI API keys?
Yes. Drop in keys for OpenAI, Anthropic, DeepSeek, or xAI in Settings. Keys are stored in your browser only — we never see them.
Is it open source?
The reader engine and rendering pipeline are open source. The hosted service (cloud sync, billing) is closed source.
How is this different from Notion or Obsidian?
Notion is a database with markdown attached. Obsidian is a graph-based note system. Prism MD is a focused reader for AI-generated content — designed for arriving documents, not curating them long-term.
Start reading better.
Free forever for solo use. No credit card required.