Mermaid Drawing is a free online diagram editor that allows you to create professional diagrams and flowcharts using simple text syntax. Built on the powerful Mermaid.js library, we provide an intuitive, easy-to-use interface to help developers, designers, and teams quickly create various types of diagrams.
No software installation required, no account registration needed - just open your browser and start creating. All your data is stored locally, and we respect your privacy.
Support flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, pie charts and more
Instantly see your diagram results with WYSIWYG editing experience
Support light/dark theme switching to protect your eyes
Export to PNG and SVG formats to meet different use cases
Support Chinese, English, Russian, French, Thai and more languages
All data processed locally, never uploaded to servers
Draw system architecture diagrams, data flow diagrams, class relationship diagrams to help teams understand code structure
Create Gantt charts to plan project schedules, use flowcharts to show workflows
Add clear diagram illustrations to documents to improve readability
Create teaching demonstration diagrams to help students understand complex concepts
Mermaid Drawing is built with modern frontend technologies:
If you have any questions, suggestions, or feedback, feel free to contact us: