Free tool
Online markdown editor
Live preview. Runs in your browser. Nothing uploaded.
Welcome to the Muninn markdown editor
Type on the left, see the rendered result on the right. Nothing you write here is uploaded — this editor runs entirely in your browser.
Features
- GitHub-flavored markdown (tables, task lists, strikethrough)
- Live preview
- Download as
.md - No sign-in
Try a table
| Assistant | Reads Muninn |
|---|---|
| Claude | ✅ |
| ChatGPT | ✅ |
| Codex | ✅ |
Try a task list
- Write something
- Save it somewhere durable
- Let Claude read it later
When you're ready for notes your AI assistants can read and update, sign up for Muninn — same markdown, saved to a private workspace.
Want your notes to stick around?
This editor doesn't save anything — refresh the tab and it's gone. Muninn is the persistent version: same markdown, saved to a private workspace, and readable by Claude, ChatGPT, and any MCP client on request.
- Real folders, pins, archive, search.
- Cross-device — write on your laptop, open on your phone.
- MCP endpoint your AI assistants can query directly.
- Export everything as markdown any time.