MermaidEditor

MermaidEditor

Write diagram on all devices

10 ratings
28 reviews
#108 in paid Developer Tools
📊 Productivity
🛠️ Developer Tools
$3.99

Details

  • Released
  • Updated
  • August 15, 2021
  • August 10, 2025
MermaidEditor screenshot #1 for iPhone
MermaidEditor screenshot #2 for iPhone
MermaidEditor screenshot #3 for iPhone
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About

Create and edit diagrams and charts using mermaid-js syntax with real-time preview. Export your creations as PNG or SVG files and share them across all your Apple devices.

Mermaid-js syntax highlighting
Code completion
Instant preview
Export to PNG/SVG
Cross-device editing
QuickLook preview extension
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What's New in MermaidEditor

1.8.2

August 10, 2025

- Updated mermaidjs to 1.8.2

Charts

Top Paid

The app has maintained its position at 108 recently.

Last updated on July 20, 2026.

User reviews

It’s a pity

Doesn’t work at all

Doesn’t actually work

No support for flow diagrams and I suspect an old mermaid library. Please fix

Works great but you need a trick

Design the diagram in AI like DeepSeek. Copy the code. Open mermaid documents. Press and hold and press paste. Test.txt is created. Press and hold rename to name.mmd. Select use mmd and not text. Open and it works. Use this in your prompt to AI chat: **Mermaid Rules for My Editor**
1. **Types**: Only `flowchart TD/LR`, `erDiagram`, `mindmap`
2. **Syntax**:
- No `#`, `---`, `\n`, emojis, or Unicode
- Labels: `"quoted"` only
3. **Style**:
- Max 2 `classDef` (e.g., `fill:#f9f9f9,stroke:#333`)
4. **File Handling**:
- Paste raw → Save as `.txt` → Rename to `.mmd`
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Doesn't work

Tried two diagrams that work elsewhere
didn't work.
likely old mermaid lib. No refund. V lame

Doesn’t open Mermaid files.

The irony of this app being called Mermaid Editor but not actually being able to gracefully open files with the .mermaid extension is laughable.

Developer apps

FAQ

What devices does MermaidEditor support?

MermaidEditor is available for Mac, iPhone, and iPad. It leverages document browser capabilities for seamless editing across these platforms.

How does MermaidEditor help with writing diagrams?

MermaidEditor offers syntax highlighting and code completion specifically for mermaid-js grammar, making it easier and faster to write clear diagrams.

Can I export my diagrams from MermaidEditor?

Yes, you can easily export your charts as PNG images or SVG files with a single click directly from the editor.

What is the pricing for MermaidEditor?

MermaidEditor is a paid application, priced at $3.99. There are no in-app purchases or ads.

How often is MermaidEditor updated?

The app was last updated on August 10, 2025, indicating active development. The current version is 1.8.2.

What is the user sentiment for MermaidEditor?

MermaidEditor has an average rating of 2.3 stars from 10 ratings, suggesting mixed user satisfaction.

Is MermaidEditor suitable for younger users?

MermaidEditor has an age rating of 4+, making it generally appropriate for younger users, though its functionality is geared towards technical diagram creation.

Does MermaidEditor have a preview feature?

Yes, MermaidEditor provides an instant preview that auto-generates as you type. You can zoom and pan the preview to inspect diagram details.