Design Tools
Pixel Quantization
Image Color Palette Extractor
Extract harmonic 5, 8, or 10-color palettes from any image locally. Export formatted CSS custom properties, raw JSON, or swatch PNG images.
Drop an image or click to sample colors
Instant client-side color frequency quantization
Upload an image above to see dominant colors extracted in real time.
Extracted Swatches
CSS Variables
/* Upload an image to generate CSS variables */
JSON Format
/* Upload an image to generate JSON data */How Color Extraction Works
When an image is dropped into ToolBoxer, an in-memory Canvas downsamples the image pixels to calculate color cluster peaks. Similar hues are merged and sorted by visual dominance, filtering out low-opacity noise to produce balanced, harmonious swatches suitable for design systems and CSS variables.
Frequently Asked Questions
Yes. Simply click on any color swatch card in the grid to copy its HEX code instantly to your clipboard.