APNG

<p>Animated Portable Network Graphics (APNG) is a <a href="/facts/File_format/qrXbwJaH">file format</a> which extends the <a href="/facts/Portable_Network_Graphics/mwgK6xw5">Portable Network Graphics</a> (PNG) specification to permit <a href="/facts/Computer_animation/rPW63nm0">animated</a> images that work similarly to animated <a href="/facts/Graphics_Interchange_Format/HfIBWrIC">GIF</a> files, while supporting 24 or 48-bit images and <a href="/facts/Alpha_compositing/7uUBtjrt">full alpha transparency</a> not available for GIFs. It also retains <a href="/facts/Backward_compatibility/FbHFBu5y">backward compatibility</a> with non-animated PNG files.
</p><p>The first <a href="/facts/Film_frame/27Uqo8WN">frame</a> of an APNG file is stored as a normal PNG stream, so most standard PNG decoders are able to display the first frame of an APNG file. The frame speed data and extra animation frames are stored in extra chunks (as provided for by the original PNG specification). APNG competed with <a href="/facts/Multiple-image_Network_Graphics/BcLEmY46">Multiple-image Network Graphics</a> (MNG), a comprehensive format for bitmapped animations which was created by the same team as PNG and is obsolete. APNG's advantage was the smaller library size and compatibility with older PNG implementations.
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APNG open-in-new

APNG