Color by Number Generator - Online from Photo to Paint-by-Numbers
Upload an image and convert it into a paint-by-numbers outline with numbered palette. Adjust complexity. Print and paint. Local processing.
UD5 Toolkit
Test wall colors on sample rooms instantly — see before you paint
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Warm Neutrals
Cool & Serene
Bold & Dramatic
Warm & Cozy
Saved Colors (click to apply)
Upload an image and convert it into a paint-by-numbers outline with numbered palette. Adjust complexity. Print and paint. Local processing.
Mix two or more colors using subtractive (CMYK‑like) blending. See what happens when you combine real paints. Brush effect canvas.
Explore the RGB color space as a rotatable 3D cube. Pick a color directly from the volume. Drag to rotate. Canvas 3D.
Rotate and explore the RGB color space as a 3D cube. Pick colors directly from the volume. Interactive Three.js.
Calculate how much thinner to add to achieve the right viscosity for spray guns. Common ratios.
Browse all official LEGO colors with names, years, and hex codes. Sort by hue. Perfect for builders.
Drag a slider to see wind speed in knots/mph/kmh and the corresponding sea conditions and land effects.
Compare standard keyboard layouts side-by-side. Click keys to see characters. Useful for learning alternative layouts.
Enter an amount and see a virtual stack of $100 bills with height comparison to everyday objects.
Pick a source color and generate a complete M3 tonal palette with light/dark schemes. Export as CSS custom properties.
Enter a hex color and get its relative luminance per WCAG definition. Understand why this matters for contrast.
Enter L*a*b* values and see the corresponding RGB and hex color. Useful for advanced color manipulation.
Classic HSV color wheel with sliders. See hex, RGB, and HSL equivalents. Intuitive for artists. No server interaction.
Rotate the hue of any image globally. Turn a red car blue instantly. Download the result. Works entirely in the browser.
See a random color and type its name. Score based on accuracy. Fun for designers. Local.
Convert hex or RGB to CIELAB L*a*b* values. Understand perceptual lightness and color opponents. Local math.
Paste a JSON object and see a dynamic, draggable tree graph representation. Excellent for debugging nested data.
Type a password and see a bar that fills based on estimated bits of entropy. Color‑coded feedback. No storage.
Enter two tire sizes and see a side‑by‑side comparison of diameter, width, and speedometer error. Local math.
Enter the URL of any online image and extract its dominant colors or pick colors with a magnifier. No upload, cross‑origin friendly.
Convert any image into colored ASCII art using divs with background colors. Creates a stunning text‑based replica. View & copy HTML.
Upload an audio clip and generate an animated GIF of its waveform dancing. Shareable sound snippet. Canvas magic.
Want a green smoothie? Pick a color and get a simple healthy recipe. Detox, protein, or fruit.
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.
Draw walls on a grid and watch A*, Dijkstra, or BFS find the shortest path. Interactive animation. Learn graph traversal.
Preview how a CMYK value will look on screen (approximate). Compare with its RGB equivalent. Pre‑press check.
Enter a regular expression and see a visual railroad diagram explaining the pattern. Learn and debug regex.
Enter a hex color and hear a tone mapped to its hue. Explore the connection between color and sound. Fun perceptual experiment.
Get the exact RGB inversion (negative) of any color. Useful for dark mode theming and high‑contrast accessibility checks.
Upload a small file to see each byte as a block, color-coded by value. Visualize the structure of binary data. Client-side.