MP3Resizer - Version 1.1 MP3Resizer is designed to optimize the capacity of your portable music player by reducing the size of MP3 files. This is especially useful when listening to .MP3 files on a mobile phone, MP3 player, Pocket PC, etc.Portable MP3 players don't usually have much memory, and of course, it's a shame to waste precious megabytes.The output file size is more than three times smaller than the source file size!Using MP3Resizer, you can upload three times more music to your MP3 player than before.