Supercharged Diagramming
Design, document, and share software architecture, sequence timelines, and data models instantly with our local sandbox.
Instant Live Rendering
Write Mermaid code and watch your diagrams render immediately with zero latency. Features auto-zoom, centering, and pan tools.
Custom Diagram Themes
Switch themes on the fly. Choose from Dark, Forest, Base, Neutral, and Default templates to match your system aesthetics.
Syntax Validation & Indicators
Avoid syntax errors. The built-in parser highlights errors and gives instant warnings with active visual indicators.
Zero-Server Local Sandbox
All drafts and projects are stored securely on your browser's local storage. Fully functional offline with complete privacy.
HD Vector Exports
Export system diagrams in PNG, SVG, or high-definition PDF vector formats with customizable transparent background options.
Diagram Presets Library
Jumpstart your documentation using preset templates for flowcharts, sequence diagrams, ERDs, mindmaps, and gantt charts.
Secure, Private & Fully Offline
Mermaid Studio stores all your files in your browser's sandbox. We never upload your diagram codes or private documentation to any external server. Create as many diagrams as you want without having to register an account.