Free grid drawing tool to copy reference photos onto paper or canvas
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: Original view, Temperature map, Value structure, Saturation map, Palette and Harmony for every image, 20 analyses at a time. Lifetime Premium: one-time purchase includes Composition guides, Contrast map, tinted value bands, unlimited history, full-res export. No subscription.
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Key features
Palette with proportions showing dominant colors sized by image weight
Color harmony identification (Complementary, Analogous, Triadic, Split-complementary, Tetradic, Square, Monochromatic)
Temperature map showing warm and cool distribution across image
Value structure divided into clear zones (light, mid-tone, dark)
Saturation map showing vivid and muted areas
Composition guides identifying classic guides like golden ratio and rule of thirds
Contrast map showing where the eye lands first (Premium)
Painter-friendly color names (Yellow Ochre, Payne's Gray, etc.)
Local device processing with no image uploads
Works offline with no account required
Customizable grid with rows and columns
Cell labeling with A1 style labels
Step-by-step cell drawing mode with progress saved
Black and white and value study filters
Multiple export formats: PNG, JPG, PDF
Diagonal guide lines in cells
Canvas size matching for paper dimensions
Works on tablets and phones
Rule of thirds and golden ratio overlays
Full-size tiled PDF for murals
What makes it different
Shows color proportions, not just colors, recognizing that a 60/5 split is fundamentally different from 50/50
Four layers of analysis together show relationships single layers cannot reveal
Built by people who actually mix paint with painter-friendly vocabulary
Lifetime Premium with single payment, no subscription model
All data stays on device, no account signup required
Runs entirely in browser with no server uploads
Free with no account, watermark or paywalled features
Undertone
Grid for Artists