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Free Lossless Image Format
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[1]
Open format?
Yes
Website
flif.info
FLIF, reference implementation
Initial release
3 October 2015; 8 years ago (2015-10-03)[2]
Stable release
0.4
/ 21 November 2021; 2 years ago (2021-11-21)[3]
Repository
github.com/FLIF-hub/FLIF
Website
flif.info
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.[4]
FLIF supports a form of progressive interlacing (a generalization of the Adam7 algorithm) with which any partial download (greater than couple hundred bytes[5]) 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 [Wikidata] (FUIF), which itself was combined with Google's PIK format to create JPEG XL. As a consequence, FLIF is no longer being developed.[1]
^ ab"Notice for JPEG XL". 12 April 2020. Retrieved 19 January 2021.
^Cite error: The named reference alpha-1 was invoked but never defined (see the help page).
^"Release v0.4". FLIF-hub/FLIF. 21 November 2021.
^
"FLIF is a New Free Lossless Image Format That Raises the Compression Bar". PetaPixel. 2 October 2015. Retrieved 20 October 2016.
^"Image compression race: PNG Adam7 vs FLIF (time: 0:00)". 6 September 2015. Retrieved 19 January 2021.
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