Color conversion & manipulation library by the editors of the CSS Color specifications
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Updated
Apr 13, 2026 - JavaScript
Color conversion & manipulation library by the editors of the CSS Color specifications
Read/write HDR, EXR and UltraHDR JPGs (Gain maps), includes tone mapping and color space support.
Export colors in wider color space with wider gamut (p3). With properly interpolated sRGB fallback.
4K HDR cosmic animation generator using mathematical spiral dynamics. JIT-optimized (22x speedup) with Rec. 2020 color gamut support. Create stunning visualizations from dynamical systems.
A blazing-fast, privacy-first, zero-upload client-side HDR PNG converter — turn any ordinary sRGB image into a true high-dynamic-range PNG with PQ (ST 2084) transfer, Rec.2020 wide-gamut color, and HDR10-compatible cICP/cHRM/iCCP metadata, entirely in your browser. Powered by Preact, Vite, and a persistent Web Worker pipeline.
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