The Quite OK Image Format for
Fast, Lossless Compression
QOI is fast. It losslessly compresses images to a similar size of PNG, while offering 20x-50x faster encoding and 3x-4x faster decoding.
QOI is simple. The reference en-/decoder fits in about 300 lines of C. The file format specification is a single page PDF.
- Reference en-/decoder on Github
- File Format Specification
- Benchmark Results on 2879 different images
- Test images in QOI and PNG format – ZIP Archive, 5.4MB
- Lossless Image Compression in O(n) Time — the blog post announcing QOI
- The Quite OK Audio Format – related in spirit
A list of tools, implementations and software supporting QOI can be found in the README on Github.
The QOI-Logo (framed version) and the specification pdf are released as public domain under the CC0 License and may be freely used.
Dominic Szablewski –
phoboslab.org
made in Hesse <3