FAQ 2 of 6
Technical Questions
Technical answers below describe the PNG format itself. Applications and production systems may support only a practical subset.
Is PNG compression lossless?
Yes. Standard PNG image data uses lossless DEFLATE compression in a zlib datastream. Encoder compression choices can change file size without intentionally discarding decoded pixel information.
What color types does PNG support?
PNG supports grayscale, truecolor RGB, indexed-color, grayscale with alpha, and truecolor RGB with alpha. Allowed bit depths depend on the selected color type.
Does PNG support CMYK?
PNG does not define a standard CMYK image color type. Many production workflows accept RGB PNG artwork and perform device-specific color conversion later.
What is the maximum PNG size?
The format stores nonzero width and height as four-byte unsigned PNG integers limited to 2,147,483,647. Real software, memory, upload, and machine limits are much smaller and control practical use.
Can PNG store resolution?
PNG can include a pHYs chunk describing pixels per unit or pixel aspect ratio. Physical-size metadata is optional and may be interpreted differently, so production checks should use actual pixels and intended output size.
Does PNG support animation?
The current PNG specification includes APNG frame-based animation. Production systems commonly expect static artwork, so confirm that the submitted file is static unless animation is explicitly supported.