DevNb

Editors/Markdown Editor

Markdown Editor with Tables & Mermaid

Create technical documentation, notes, and blog posts with live split-screen preview. Includes native support for GitHub Flavored Markdown (GFM) tables and real-time embedded Mermaid diagrams. Nothing leaves your browser.

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Markdown Source
50 lines Β· 182 words
Document Preview
1 min read Β· 1667 chars
Words: 182Characters: 1667Lines: 50Reading time: 1 min
GFM Tables & Embedded ```mermaid blocks supported.

Markdown tables and Mermaid integration

Unlike basic Markdown tools that only support standard bold and list syntax, this editor brings full specification support for complex tables and declarative diagrams.

GFM Markdown Tables

Format tabular data with customizable text alignment using colons on the delimiter row:

| Endpoint | Method | Rate Limit | Description |
| :--- | :---: | ---: | :--- |
| /api/v1/users | GET | 100/min | Retrieve user profile |
| /api/v1/auth | POST | 10/min | Authenticate credentials |

Embedded Mermaid Diagrams

Embed architecture graphs, flowcharts, or sequence diagrams directly inside code fences:

```mermaid
graph LR
    User[Developer] --> Editor[Markdown Editor]
    Editor --> Preview[Live SVG Render]
```

FAQ

Are my documents uploaded or stored in the cloud?

No. Parsing, Markdown compilation, and Mermaid rendering occur 100% in your browser memory. Local drafts are stored in your browser's localStorage only.

How do I create tables in Markdown?

Use pipes (|) to separate columns and hyphens (-) to define header rows. Colons set alignment: :--- for left, :---: for center, ---: for right.

Can I render Mermaid diagrams inside this editor?

Yes. Use standard code blocks with the mermaid language tag. The live preview detects and renders them as interactive SVG diagrams.

Can I copy rendered HTML into WordPress or email?

Yes. Click Copy HTML on the toolbar to get standard, semantic HTML ready to paste into any CMS, blog engine, or email template.

Does the editor support task checklists?

Yes. Use - [x] Done task and - [ ] Pending task syntax to render interactive checkboxes.

Need a dedicated canvas for complex architecture diagrams? Open the Mermaid Diagram Editor β†’