Free live Mermaid diagram editor with no signup required
Design intelligence tools for logo analysis, design preflight, and creative brief analysis
Stage
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Founded
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Based in
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Pricing model
Free
Freemium
Pricing
Not given
Free Logo Analyzer with up to 5 analyses per day. Paid one-time services: Logo Vectorizer from $2.90, Creative Brief Analyzer for $4.90, Design Preflight for $9.90. Professional design services available with package pricing shown before purchase in USD.
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
Free logo analysis with clarity, balance and small-size readability checks
Real-world stress testing at favicon, 32px icon, social avatar, navbar, light and dark backgrounds
Logo vectorizer to convert raster artwork into clean, scalable vectors
Design preflight for print readiness and file delivery checks
Creative brief analyzer to clarify requirements and visual direction
AI-assisted interpretation combined with pixel-based measured checks
Design Passport for branded client handoff documentation with file inventory and specifications
AI Prompt Generator for tailored image generation and writing prompts
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
Separates observed facts from interpretation with confidence levels instead of generic advice
Reports prioritize issues most likely to affect readability, handoff or production
No subscription required; pay only for one-time reports and services
FlowViz
DesignAuditly