Zopfli:* encode data into Google's Zopfli format

Upload a zip (max 5MB)** containing one or more files

Encode data into Zopfli format

Zopfli is Google's new algorithm for data compression into DEFLATE, gzip and zlib formats. It's around 3–8% smaller than zlib's highest compression, but takes about 80 times longer. Decompressing Zopfli archives carries no penalty compared to zlib, though. Zopfli is best used for one-time compression of static content, eg. PNG files, WOFF font files, or zip-based format such as APK or JAR.

* Zopfli is available as free software under the terms of version 2.0 of the Apache License. It is based on an algorithm from Jyrki Alakuijala. A reference implementation was written by Jyrki Alakuijala and Lode Vandevenne, both Google employees. Online implementation by t0r.org

** for larger files please download the command line version at github.com

validator.w3.org/check jigsaw.w3.org/css-validator/validator