According to Google’s official blog, Zopfil is an open-source algorithm that is intended to accelerate data transfer speeds and reduce Web page load times by compressing content up to 8 percent smaller compared with current technology.
PC World states that Zopfli is compatible with Zip, PNG, gzip and HTTP requests.
According to iProgrammer, another advantage is that Zopfil “can produce zip files that are up to 5% smaller with no negative effects on the end user.”
Describing the new program, Lode Vandevenne, a software engineer on the Google compression team, is quoted on CNET as saying: “The higher data density is achieved by using more exhaustive compression techniques, which make the compression a lot slower, but do not affect the decompression speed. The smaller compressed size allows for better space utilization, faster data transmission, and lower web page load latencies.”