Higher compression rates
PNG uses better image compression technology than GIF,
allowing for smaller files that download more quickly. PNG files average about 30% smaller than equivalent
GIF file
Higher bit depths (more colors)
PNG allows for 1, 2, 4, 8, 16, 24 and 32 bit images, smashing the 8-bit barrier
A permanent, royalty-free license
PNG is being developed by the W3C, and will always be a free and open standard
Multiple layers of transparency
PNG images allow for full alpha channel transparency, which makes
moving images from one background to another easy
Built-in gamma correction
Users can see an image the way it was intended to be seen by
selecting the gamma level intended for their monitor
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