Free Lossless Image Format

Free Lossless Image Format
Filename extension .flif
Magic number FLIF
Initial release 3 October 2015 (2015-10-03)[1]
Latest release
(8 November 2016 (2016-11-08)[2])
Open format? Yes

Free Lossless Image Format (FLIF) is a work-in-progress 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. [3]

FLIF supports a form of progressive interlacing (a generalization of the Adam7 algorithm), which means that any partial download of a compressed file can be used as a reasonable lossy encoding of the entire image.


The format was initially announced publicly in September 2015,[4] with the first alpha release occurring about a month later, in October 2015.[1]

The first stable version of FLIF was released in September 2016.[5]


For compression, FLIF uses MANIAC (Meta-Adaptive Near-zero Integer Arithmetic Coding), a variant of CABAC where the contexts are nodes of decision trees which are dynamically learned at encode time.


External links

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