Free live Mermaid diagram editor with no signup required
Desktop scientific plotting and data analysis software for researchers
Stage
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Founded
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Based in
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Pricing model
Free
Freemium
Pricing
Not given
Free version available. SmartPlot Plus: 1 person $8, 2 people $7 each, 3+ people $6 each. One-time purchase, does not expire, supports up to 3 active devices per license. Each Plus License includes 50,000 S points per month for AI usage.
Key features
Live preview as you type
21 diagram types including flowcharts, sequence, class, state, ER, Gantt, git graph, mindmap and timeline
Two-way editing for flowcharts
SVG and PNG export
Share diagrams as URLs with embedded diagram content
Built-in template picker and cheatsheet
No account or signup required
Works entirely in browser with local storage
Open Mermaid Live Editor links
Mermaid v11 syntax support
Data import from CSV, TXT, and other formats
Advanced analysis tools including baseline correction, peak fitting, and curve fitting
Figure composition tool for combining plots and images
Editable flowcharts with BPMN and UML shapes
In-app AI Smart Panel for analyzing data through conversation
Export to PDF, SVG, PNG, JPG, TIFF, and PPTX formats
Customizable color palettes and gradient colors
Workflow template recording and reuse
Bilingual interface supporting English and Chinese
What makes it different
No signup, paywall, or data collection required
Diagrams stay in your browser's local storage by default
Two-way editing that updates code when you edit the canvas
Live preview with no render button required
Clean SVG export for professional use in docs and slides
Desktop application with local data processing for secure research data handling
In-app AI integration through MCP protocol for editing plots through conversation
Reusable workflow templates that record and automate repetitive analysis steps
Figure composer for precise multi-panel layouts with aligned plot areas
Support for Windows, macOS, and Linux beta platforms
FlowViz