Free browser-based tools for painters. No sign-up, no uploads to a server — everything runs locally in your browser.
Load a reference photo, adjust the settings, export what you need. That's it.
Simplify your reference photos into flat tonal levels. Adjust color modes, edge detection, smoothing, and export a clean painting reference.
Values & SimplificationOverlay rule of thirds, golden ratio, golden spiral, and dynamic symmetry on your reference. Crop to test framing, reduce to notan values, or visualize focal point density.
Composition & LayoutSee what you're NOT painting. Threshold silhouettes reveal shapes, click-to-fill highlights negative areas, and contour view strips everything to outlines.
Negative Space & ShapesSteal the perfect palette from any photo. Extract dominant colors, identify the color harmony, get warm/cool bias indicators and oil paint mixing suggestions.
Color & PaletteMap every area of your reference to a numbered value scale. Hover to read values, simplify into 3, 5, or 10 steps, and get a mixing strip for paint values.
Values & ToneSet a unit, overlay a measurement grid, and compare distances anywhere in your reference. Essential for figure drawing and portrait accuracy.
Measurement & ProportionSee warm and cool areas in any photo. Orange glow for warm, blue for cool. Plan where to push temperature shifts in your painting.
Color TemperatureShrink your reference to see only big shapes. Adjustable resolution with optional notan reduction for quick thumbnail composition studies.
Composition & Planning