Pretty much every multimedia converter or audio editor supports both MP3 and PCM audio format (.wav or .wave), which means mp3 to wave conversion is certainly doable. Just keep in mind that MP3 files are already compressed and once you convert them back, the quality will not improve, just file size.
Open MP3 file Open WAVE fileA music composition and editing program
A music library management program - renamed to Helium (version 12) and replaced in 2016
An audio recording and ripping tool