MermaidEditor1.8.2

MermaidEditor is a diagram and chart editor, powered by mermaid-js. And MermaidEditor supports iPhone, iPad and Mac, with one app you can edit diagram everywhere on any device.

MermaidEditor supports mermaid-js syntax highlighting and code completion, so it can help writing diagram and chart clearly, easily and quickly.

You can also easily export charts as PNG images or SVG files from the editor, or share image to other people with system actions.

√ All Platforms

- Both Mobile and Desktop platforms supported, you can edit diagram documents on iPhone, iPad or Mac
- Document browser based app, easily edit files on device and sync document between devices
- Multiple windows ready, it makes the editor more powerful on iPadOS
- Keyboard shortcuts ready on iPadOS with keyboard connected

√ Powerful Editor

- Syntax Highlighting for mermaid-js grammar
- Auto Completion in editor helps typing keywords quickly
- Code Snippets likes parallel block in sequence diagram makes life easier
- Instant Parsing Error indicator for locating syntax error

√ Instant Preview

- Auto Generated Preview when typing in editor
- Zoom and Pan to move preview for checking diagram's detail
- With Scroll wheel it can be easily zoom diagram on macOS

√ Integrated Extensions

- Thumbnail support, every .mmd file will has its own thumbnail when saving file
- QuickLook Preview extension helps you preview mermaid document in Files app on iPhone or iPad and Finder on macOS

√ Sharing

- Save diagram document as its source with .mmd extension
- Export diagram to PNG image or SVG file with one click

For mermaid-js grammar, please visit https://mermaid-js.github.io/mermaid/ for documentation.

Version History - Updated mermaidjs to 1.8.2 1.8.2 08/10/2025 Updated mermaid.js to v10.9.1 1.8.1 05/25/2024 - Added code block folding feature to the text editor 1.8.0 07/28/2023 - mermaid updated to v10.2.4
- Added templates for Git, Mindmap, Guadrant, Requirement diagrams 1.7.0 07/10/2023 - Update mermaid to v10.1.0 1.6.0 05/23/2023 - Update mermaid-js to 8.14.0 1.5.2 02/26/2022 - Add document type compatibility to avoid extension conflicts 1.5.1 01/01/2022 - NEW: You can preview mermaid documents in Files app now
- NEW: Add QuickLook Preview extension
- FIX: Improve thumbnail generating for mermaid documents 1.4.0 09/20/2021 - Increase editor width when in landscape mode
- Add iPhone support 1.3.0 09/04/2021 - Fix parsing error indicator in editor 1.2.1 08/30/2021 - Thumbnail extension added, now .mmd file has thumbnail in document browser
- Fix thumbnail orientation of opened files
- Fix preview failed when diagram image to large
- Fix create new document does not prompt for saving
- Improve error message displaying
- Improve dark mode compatibility 1.2.0 08/28/2021 - Add Command+Shift+[ or ] to switch between opened files
- Add Command+Shift+D to back to document browser
- Fix create document does work when previous creation cancelled 1.1.0 08/22/2021 Improve content layout of editor and preview window when keyboard is visible. 1.0.1 08/17/2021 1.0 08/15/2021