A RAW file is a raster image produced by digital camera models such as Leica, Casio, and Panasonic. Typically, RAW files contain uncompressed and unaltered raw image data that can be edited using any software that supports the format. Generally, RAW files have higher image quality than standard image formats like JPG and PNG.
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PNG (Portable Network Graphics) is a raster image file format released in 1996 as a replacement for JPEG. That said, PNG uses lossless compression that gives it a small file size while still maintaining the original image quality. Today, PNG format is widely used to share image graphics over the internet and is supported by programs like Paintshop Pro, Adobe Photoshop, Microsoft Paint, Apple’s Preview, etc.