Image Compression GitHub Repositories (2026) · Open Source Tools

JPEG XL image format reference implementation

Dinky makes files smaller.

Smaller images, same picture. Compress PNGs to PNG or WebP with automatic quality. PNG output is 8–12% smaller than TinyPNG at equal quality on the median image. Command line and browser.

PHP client for the Tinify API.

CharLS, a C++ JPEG-LS library implementation

Limited Error Raster Compression