heydeer / pngdeer

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.

oxipng / oxipng

Multithreaded PNG optimizer written in Rust

kornelski / pngquant

Lossy PNG compressor — pngquant command based on libimagequant library