Mermaid Live Editor - MMChart

DAC Tech Development

About this app

Turn ideas, code, and complex systems into clear diagrams with Mermaid Live Editor - MMChart, a fast mobile Mermaid editor with live preview, syntax highlighting, local file support, and professional export tools.

Whether you map software architecture, organize concepts, document a process, or build a Gantt chart, MMChart gives you a focused code-to-diagram workspace on Android. Write Mermaid syntax and watch the result update away from your desktop.

Mermaid editor with live preview

• Write Mermaid code in a mobile-friendly source editor
• See the diagram render as your source changes
• Use clear line numbers and Mermaid syntax highlighting
• Undo and redo edits with recoverable local drafts
• Keep the last successful preview visible when new source contains an error
• Read useful render errors instead of losing your work

Diagram maker for technical and visual work

Create flowcharts, sequence diagrams, class diagrams, state diagrams, entity relationship diagrams, user journeys, Gantt charts, pie charts, quadrant charts, requirement diagrams, Git graphs, C4 diagrams, mind maps, timelines, ZenUML diagrams, Sankey diagrams, XY charts, block diagrams, packet diagrams, Kanban boards, architecture diagrams, radar charts, and treemaps.

Some Mermaid diagram types are marked beta or experimental by the bundled Mermaid engine. MMChart keeps that distinction visible instead of silently changing your source.

Examples and offline Mermaid guide

Start faster with ready-to-edit examples for flowcharts, sequence diagrams, project plans, mind maps, app architecture, and Git Flow. Open an example, study the Mermaid syntax, customize it, and save it as your own diagram. A practical quick-start guide is included for offline use, while the official Mermaid documentation remains available through an optional browser link.

Open, edit, and save Mermaid files

• Create new diagrams without an account
• Open .mmd, .mermaid, and compatible text files through the Android file picker
• Save changes or choose a new destination with Save As
• Work with multiple diagram tabs and restore safe local drafts
• Keep recent diagrams within easy reach
• Preserve the original external file until you explicitly save

Preview large diagrams comfortably

Fit a rendered diagram to the preview area, zoom in for fine details, zoom out for context, pan in every direction, reset the viewport, or open a focused full-screen preview. Choose light, dark, forest, neutral, or base Mermaid themes while keeping the app interface comfortable in light or dark mode.

Export and share polished diagrams

Export the current successful render as scalable SVG, transparent PNG, JPEG with a solid background, compressed WebP, or PDF. Select the destination on your device or share a completed export with another app. MMChart uses the same rendered result for preview and export so your saved diagram matches what you reviewed.

Designed for offline and private work

The core editor, examples, quick guide, Mermaid renderer, preview, file tools, and export pipeline work locally without a backend account. Your Mermaid source is rendered on your device and is not uploaded to a diagram-rendering server. Remote fonts, images, and icon packs referenced by a diagram may not be available offline.

Why choose MMChart?

• Fast text-to-diagram workflow built for Android
• Real-time Mermaid preview and readable syntax colors
• Broad diagram support for software, study, planning, and documentation
• Pan, zoom, fit, full-screen preview, and diagram themes
• Local files, recovery drafts, examples, and offline help
• High-quality SVG, PNG, JPEG, WebP, and PDF export
• No sign-in required for the core diagram workflow

Build a quick flowchart, document an API sequence, explain a database model, plan a release, visualize Git history, or map an entire software system. With Mermaid Live Editor - MMChart, your Mermaid diagrams stay close, editable, and ready to share wherever you work.

What’s new

release app