APNG

File Format
Name	APNG
Ontology	Electronic File Formats Graphics APNG
Extension(s)	.png
MIME Type(s)	image/vnd.mozilla.apng, image/png, image/apng
PRONOM	fmt/935
Kaitai Struct Spec	png.ksy

APNG is an unofficial extension of the PNG image format. It supports animation similar to animated GIF. The Mozilla Corporation was involved in its development.

APNG files are valid PNG files. When an APNG file is viewed in a program that does not support the APNG extensions, it will appear as a still image chosen by the creator of the APNG file.

APNG supports 24-bit color and 8-bit transparency, whereas GIF supports 256 colors per image palette and binary transparency.

Browser support

APNG is supported on Mozilla Firefox (Gecko layout engine) as of version 3.0 (June 17, 2008), Safari (WebKit layout engine) as of version 8.0 (October 16, 2014), and Chrome (Blink layout engine) as of version 59 (June 5, 2017). It's also supported on Firefox for Android and iOS Safari.

Blink layout engine based browsers like Google Chrome (pre version 59) and Opera (post version 15, pre version 46) require an add-on to render APNG files.

It was supported natively on Opera (Presto layout engine) from version 9.5 (June 12, 2008) through version 12.17 (April 23, 2014). Support was re-added in version 46 (Jun 20, 2017) when the Blink layout engine added APNG support.

Microsoft Internet Explorer (Trident layout engine) does not support APNG.

See also

• MNG

Specifications

• APNG Specification
• PNG specification § 4.9

Sample files

• http://littlesvr.ca/apng/samples.html
• http://people.mozilla.com/~dolske/apng/demo.html

Software

• XnView
• Tom's Editor (it's an image editor so displays only the first frame)

External links

• Wikipedia article
• Konvertor
• APNG Anime Maker, free software for creating APNG's