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APNG
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{{short description|File format}} {{other uses}} {{Infobox file format | name = Animated PNG | icon = | screenshot = [[file:Animated PNG example bouncing beach ball.png]] | caption = An animated PNG, or APNG, of a bouncing ball (displays as static image in [[Comparison of web browsers#Image format support|some web browsers]]) | extension = {{code|.png}}, {{code|.apng}} | mime = {{code|image/png}}, {{code|image/apng}}, <s>{{code|image/vnd.mozilla.apng}}</s> | owner = [[Mozilla Foundation]] (adopted by [[World Wide Web Consortium|W3C]]) | creatorcode = | genre = animated [[Lossless data compression|lossless]] [[Raster graphics|bitmap]] [[Graphics file format|image]] | containerfor = | containedby = | released = {{start date and age|2004|08|27}}<ref name="bugzilla">{{cite web |title=Add APNG support for Mozilla |url=https://bugzilla.mozilla.org/show_bug.cgi?id=257197 |website=Bugzilla |publisher=Mozilla Foundation |access-date=23 April 2024 |date=27 August 2004}}</ref> | extendedfrom = [[Portable Network Graphics|PNG]] | extendedto = | open = yes | url = }} '''Animated Portable Network Graphics''' ('''APNG''') is a [[file format]] which extends the [[Portable Network Graphics]] (PNG) specification to permit [[computer animation|animated]] images that work similarly to animated [[Graphics Interchange Format|GIF]] files, while supporting 24 or 48-bit images and [[Alpha compositing|full alpha transparency]] not available for GIFs. It also retains [[backward compatibility]] with non-animated PNG files. The first [[film frame|frame]] 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 [[Multiple-image Network Graphics]] (MNG), a comprehensive format for bitmapped animations which was created by the same team as PNG and is obsolete.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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