Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Mac
- Windows
- Linux


MozJPEG is described as 'Reduces file sizes of JPEG images while retaining quality and compatibility with the vast majority of the world's deployed decoders' and is an app in the development category. There are three alternatives to MozJPEG for Mac, Windows and Linux. The best MozJPEG alternative is Guetzli, which is both free and Open Source. Other great apps like MozJPEG are libjpeg-turbo and libjpeg.


libjpeg-turbo is a derivative of libjpeg that uses SIMD instructions (MMX, SSE2, NEON) to accelerate baseline JPEG compression and decompression on x86, x86-64, and ARM systems. On such systems, libjpeg-turbo is generally 2-4x as fast as the unmodified version of libjpeg, all...
libjpeg is a library, while MozJPEG is an application. IOW, you can't use libjpeg if you aren't a software developer, while MozJPEG can be run by any computer end-user