Free Lossless Image Format
Free Lossless Image Format (FLIF) is a lossless image format claiming to outperform PNG, lossless WebP, lossless BPG and lossless JPEG 2000 in terms of compression ratio on a variety of inputs.
| Filename extension |
.flif |
|---|---|
| Internet media type |
image/flif |
| Uniform Type Identifier (UTI) | public.flif |
| Magic number | FLIF |
| Developed by | Jon Sneyers and Pieter Wuille |
| Latest release | FLIF16 |
| Extended to | FUIF, JPEG XL |
| Open format? | Yes |
| Website | flif |
| Initial release | 3 October 2015 |
|---|---|
| Stable release | 0.4
/ 21 November 2021 |
| Repository | |
| Website | flif |
FLIF supports a form of progressive interlacing (a generalization of the Adam7 algorithm) with which any partial download (greater than couple hundred bytes) of an image file can be used as a lossy encoding of the entire image.
Jon Sneyers, one of the developers of FLIF, since combined it with ideas from various lossy compression formats to create a successor called Free Universal Image Format (FUIF), which itself was combined with Google's PIK format to create JPEG XL. As a consequence, FLIF is no longer being developed.
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