Mp3 Knife is a very popular and effective tool for trimming MP3 audio files. It can be successfully used to create ringtones for smartphones or to divide long audiobooks into shorter chapters. The application is trivially easy to use (even though there is no Polish language version) and is characterized by high speed of operation.

It does not require any specialist knowledge from the user, and the process of extracting a selected audio fragment is limited to just a few mouse clicks. Importantly, Mp3 Knife does not compress / decompress the sound during its operation so that the MP3 file on the output has the same quality as the original audio file. The Mp3 Knife tool, according to its name, supports only MP3 files - both as input and output material.