FREE TOOL
Mermaid Diagram Editor
Live preview. Instant exports. Shareable links. 100% browser-based.
The fastest way to build flowcharts, sequence diagrams, ER models, class diagrams, mindmaps, and more. No account. No data leaves your computer.
Tip: Edit the left side and the preview updates live. Use the snippet buttons or load an example. Share the URL to collaborate.
See every change rendered instantly. No save button, no reloads.
Download clean SVG or high-resolution PNG with one click. Perfect for docs, slides, and wikis.
Your diagram lives in the URL. Send the link and others see exactly what you built.
Everything runs in your browser. Diagrams never leave your device.
Common Mermaid use cases
Flowcharts and C4-style diagrams that explain how services connect.
Sequence diagrams for request lifecycles and integration points.
ER diagrams and class diagrams for your domain model and database.
Gantt charts and mindmaps for planning and onboarding.
Frequently asked questions
Yes. Use it as much as you want. No sign up, no limits, no watermarks.
No. Open the page and start editing. It works on desktop and modern mobile browsers.
All core types: flowchart, sequenceDiagram, classDiagram, erDiagram, gantt, mindmap, pie, state, gitGraph, and more. The editor uses the latest Mermaid renderer.
Absolutely. Export SVG or PNG and drop them into READMEs, Notion, Confluence, Google Docs, or any Markdown file.
The entire diagram is encoded in the URL query parameter. Bookmark it, email it, or paste it anywhere. No server storage involved.
This editor is lightweight, focused, and built by the Moxie Docs team. It emphasizes fast exports, clean URLs, and privacy with zero tracking on the tool itself. Great when you want something simple and embeddable in a dev workflow.
Tired of manually maintaining diagrams for your codebase?
Moxie Docs connects to your GitHub repositories, understands real architecture and data flows, and generates accurate, up-to-date Mermaid diagrams plus full searchable documentation. Every merge keeps docs current. Fridays surface a single reviewable Cleanup PR.
No credit card required to start. Cancel anytime.