Zopfli

Zopfli Archive
Original authorsLode Vandevenne and Jyrki Alakuijala
DeveloperGoogle
Initial releaseFebruary 2013 (2013-02)
Stable release
1.0.3  / 27 November 2019 (27 November 2019)
Written inC
TypeData compression
LicenseApache License 2.0
Websitegithub.com/google/zopfli 
Repository

Zopfli is a data compression library that performs deflate, gzip and zlib data encoding. It achieves higher compression ratios than mainstream Deflate and zlib implementations at the cost of being slower. Google first released Zopfli in February 2013 under the terms of Apache License 2.0. Google archived the project in October 2025.

The name Zöpfli is the Swiss German diminutive of “Zopf”, an unsweetened type of Hefezopf.