Share Markdown with a link.
Paste Markdown, publish, send the link. Code is highlighted, diagrams render, and anyone can comment on a line or fork the doc to suggest edits. No account needed.
Already published somewhere?
Paste a URL and mdbin turns the page into Markdown for you.
Just need a diagram?
Write Mermaid or PlantUML with real-time updates, then download it as an image.
Written in plain text. Read as a document.
The same document, two ways. Your source stays exactly as you typed it — readers get headings, highlighted code, alerts and diagrams.
Code and diagrams
Per-language highlighting, plus Mermaid, PlantUML and FreeDraw diagrams that draw themselves from a fenced block.
Threads on a line
Anyone can start a conversation against line 42. No account, no invite, no email address.
Edits arrive as forks
Editing a doc creates a new linked version. The whole chain stays visible, so nothing is overwritten.
Recently shipped
- Bearer mdb_… Accounts and MCP Optional sign-in for a dashboard and ownership — plus an MCP server, so coding agents can publish for you. See the docs →
- ```freedraw FreeDraw diagrams Hand-drawn flowcharts render inline, straight from a fenced block. See the docs →
-  Images Embed images in your Markdown — fetched, checked, and served from our CDN. See the docs →