Standard File Formats for Graphics Files

This image is saves as JPEG and is 13.8 KBImage

This image is saved as GIF and is 20.5 KB Image

This image is saved as PNG and is 81.3 KB Image

There is not much difference between the three images, all three become pixelated when zoomed in. However, the GIF file becomes more pixelated than the others as it uses lossless compression to reduce the file size.

JPEG uses lossy compression and is an image file format supported by the web. The information that is deleted through the compression technique is data that the human eye cannot see. GIF uses lossless compression but only supports 256 colours, and is better to be used for images with few colours (black/white) and small text. A lossless PNG file can be 5% – 25% more compressed than a GIF file of the same image. Saving, restoring and re-saving a PNG image will not degrade its quality also PNG does not support animation like GIF does.


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