- mp3Trim can trim MP3s - obviously! - removing the silence or unwanted parts.
- mp3Trim can adjust the volume of MP3s. Volume change can be manual or automatic (volume normalization).
- mp3Trim can fade-in/out MP3s (to fix abrupt beginning/ending).
- mp3Trim can clean-up MP3s and recover wasted disk space.
- mp3Trim keeps the music quality intact, no matter how many times you process an MP3, because it works directly in the MP3 format without having to decode/re-encode. That also makes it very fast.

mp3Trim PRO 1.90 includes:
- multi 100's megabytes MP3 file support
- drag'n drop batch & log file support, i.e. you don't have to open the files one by one if you want to process several files or directories, just drag them all at once!
- 'thumbnail' batch creation (for example to extract the first 30 seconds of your tracks, for preview)
- VBR seek information and CRC fix
- smarter digital silence detection algorithm
- low bit-rate MPEG-2/2.5 support