It appears to beat, in compression every other existing lossless image codec in every scenario: wow!
It supports alpha channel, up to 16 bit per channel, is interlaced by default for progressive loading and decoding.
Kind of compression performance to expect:
26% smaller than brute-force crushed PNG files.
35% smaller than typical PNG files.
For lossless, that's huge gains.
FLIF – Free Lossless Image Format
FLIF – Free Lossless Image Format. FLIF is a novel lossless image format which outperforms PNG, lossless WebP, lossless BPG and lossless JPEG2000 in terms of compression ratio. According to the compression experiments we have performed, FLIF files are, on average: …