Checkmate MP3 Checker is described as 'free program that checks MP3 files for errors. It scans MP3 files to see if the frames are where they are supposed to be, whether the frame headers are correct and whether the frame headers are consistent throughout the file'. There are three alternatives to Checkmate MP3 Checker for Linux, Mac and Windows. The best alternative is MP3val, which is both free and Open Source. Other great apps like Checkmate MP3 Checker are MP3 Check (Free, Open Source) and MP3 Scan + Repair App (Free, Open Source).
MP3val is a small, high-speed, free software tool for checking MPEG audio files' integrity, a free software tool to validate and fix MPEG audio files. It can be useful for finding corrupted files (e.g. incompletely downloaded, truncated, containing garbage).
Helps to identify in explicit detail MP3s that do not correctly follow the MP3 format. It also looks for invalid frame headers, missing frames, etc., and generates useful statistics. This can be useful when building a high-quality mp3 archive.