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

The conversion reduces file sizes significantly (often as much as 70%) and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems.

NB: don't use version 1.0 of pngquant . There is a massive difference in quality and compression between recent versions and the obsolete version that is shipped in some Linux distributions. Use pngquant -v to check.

Current version is 2.12.5 ( changelog , feed , all releases ).

Authors

pngquant is developed by Kornel Lesiński and contributors. It's based on code by Greg Roelofs and Jef Poskanzer.

Please submit bug reports or feature requests on GitHub.

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Donations are welcome via PayPal. Thank you for your support!