The X

1 files use the extension of APNG

.APNG

Animated Portable Network Graphic

Classification:raster image file
Unofficial extension to the Animated Portable Network Graphic (APNG) format; contains multiple frames (.PNG images) used for an animation sequence; similar to an animated .GIF file, but also supports 24-bit images and 8-bit transparency.

instruction:

Since the initial frame in a APNG file is stored as a normal PNG image, animated PNGs are backwards compatible with many applications that support PNG files. APNG files commonly use the standard ".png" extension.

APNG(Animated Portable Network Graphic) related software:

Windows

5 software

Mac

4 software

Linux

4 software

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