Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Free online Photoshop alternative for photos and PSD files
Stage
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Founded
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Based in
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GB
Pricing model
Freemium
Free
Pricing
Free: unlimited editor and preview, 3 saved diagrams, 5 AI uses total, PNG export 1× with watermark. Starter: $6.99/month or $69.90/year; 30 saved diagrams, 500 AI conversations per month, PNG export up to 4× without watermark. Pro: $11.99/month or $119.90/year; unlimited diagrams, unlimited AI, PNG
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Key features
Live preview of Mermaid code as you type
AI diagram generator, editor and syntax fixer
PNG export on every plan; JPG, SVG and PDF on Pro
All 22+ Mermaid diagram types supported
Share diagrams via public links and embeds
Save diagrams to cloud with folders and version history
Keyboard shortcuts and autocomplete
Mobile-responsive editor with pan and pinch-zoom
PSD import and export with editable text and shapes
Layers, masks and adjustment layers
On-device background removal and subject selection
Healing, cloning and object removal
Smart objects and smart filters
Offline editing after resources are cached
Support for RAW camera files
8-bit and 16-bit editing
Multiple export formats including PNG, JPEG, WebP, TIFF and PDF
Editable design templates
What makes it different
No account or sign-up required to start editing diagrams
Affordable pricing: Starter at $6.99/month, Pro at $11.99/month
Diagrams render in your browser; nothing stored unless you choose to save
Fast editor with instant rendering and clear error messages
Completely free with no account required or watermarks on exports
All editing happens locally on your device without uploading photos
Works offline after resources are cached
Opens and saves layered PSD files with editable text and shapes
Mermaid Viewer
Photostar