image compression Archives - Page 2 of 2

oxipng – multithreaded PNG optimizer

Oxipng is a multithreaded lossless PNG compression optimizer (CLI and library).

Pngcrush is a free and open source optimizer for PNG (Portable Network Graphics) files. It is a command-line tool.

Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.

OptiPNG optimizes PNG files, i.e. reduce their size to a minimum, without losing semantic information.

pngquant is a command-line utility and a library for lossy compression of PNG images.

Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.

MozJPEG improves JPEG compression efficiency achieving higher visual quality and smaller file sizes at the same time.

Guetzli is a JPEG encoder that aims for excellent compression density at high visual quality.