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Text & Code

Markdown Editor

Live GitHub-flavored markdown preview with syntax highlighting and Mermaid diagrams

Write Markdown and watch the rendered result update live, in a split view or a full-width preview. The editor supports GitHub-Flavored Markdown (tables, task lists, fenced code blocks with syntax highlighting, and inline formatting) and renders Mermaid diagrams right in the preview, so you can draft README files, documentation, and notes without guessing how they'll look.

Runs 100% in your browser · no upload, no tracking, no ads

How to use Markdown Editor

  1. Type or paste your Markdown into the editor pane, or use the toolbar and shortcuts (Ctrl+B, Ctrl+I, Ctrl+K).
  2. See the formatted result render instantly in the preview pane; switch to Preview mode for a full-width view.
  3. Fence a code block with the mermaid language to render flowcharts and other diagrams inline.
  4. Copy the Markdown source or download it as a .md file when you're done.

Frequently asked questions

Which Markdown flavor does the editor support?

It renders GitHub-Flavored Markdown (GFM), including tables, strikethrough, task lists, and fenced code blocks, which matches how content appears on GitHub.

Can it render Mermaid diagrams?

Yes. Fence a code block with the mermaid language and the preview renders it as a live diagram, the same way GitHub does. Flowcharts, sequence diagrams, ER diagrams, state diagrams, and the other Mermaid types are all supported.

Can I use it to preview a README before pushing?

Yes. Paste your README content in and the preview approximates how GitHub will display it, including Mermaid blocks, so you can catch formatting issues before committing.

Is my document saved anywhere?

No content is uploaded. Editing and rendering happen in your browser, so your draft stays on your device.

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