Portable Network Graphics (PNG) is a graphics file format that supports lossless data compression.
The PNG format was created as an improved, non-patented replacement for the most used lossless image compression format on the Internet, Graphics Interchange Format (GIF).
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PNG was developed by an Internet committee, specifically with the intention to be patent-free. The format provides a number of improvements compared to the GIF format.
For example, PNG supports palette-based images, grayscale images and full-colour non-palette-based RGB images (with or without alpha channel).
