JNG enhances the capabilities of the JFIF format (the usual JPEG file format) by supporting transparency, two consecutive color streams (one 8-bit and the other 12-bit), and other useful PNG features like color correction, gamma correction, embedded color profiles, PNG-style metadata, checksums, etc. The transparency information inside a JNG file (as an alpha channel) can be saved either in lossless PNG format or in lossy JPEG format. This way, users can benefit from the power of JPEG compression while preserving lossless (PNG-compressed) transparency information.