MP3 Packer is a free software for Windows and Linux that rearranges data in mp3 files to generate the smallest possible mp3 file but also for other purposes such as turning VBR files into CBR files which can be handy if players are used that do not support VBR.

The application is offered as a command line version and a version with a graphical user interface on Windows. Winmp3packer, that’s the name of the gui version, has already been configured to reduce the size of mp3 files loaded into the application.

All it takes to use it is to select a folder or folders with mp3 files before clicking the process button. The application scans all mp3s located in the folders and will process them if they meet certain criteria.

A log is displayed in the end giving information about the processed files and the decrease in size.

We have run the application on three albums and it managed to decrease the size by about 5 Megabytes or 1.4%.

That may not look like much but it could add up if thousands of songs are stored on a device. The mp3 files need to be encoded with CBR for this to have any effect.

You may have noticed that the program offers additional options in its interface. Users can switch the output type from VBR to CBR, configure a fixed minimum bitrate, strip non-mp3 data from files and set a different output folder to avoid that files are overwritten by the application.

MP3Packer can be a handy program to run once on a mp3 collection to save space on the storage device. The application is available for download at the official website. (via)

Mp3 Packer is a tool that has been specifically designed for the purpose of reducing the size of mp3 files. It can be used to process any number of mp3 files since it can process all files in a directory and even its subdirectories at once. The size reduction will not affect the quality of the mp3 files, a pure lossless size reduction so to speak.

Various output settings are available that have an impact on the newly generated files. It is possible to specify a minimum bitrate, select the output type (vbr or cbr), strip non-mp3 data from the start or end of the file, append text to the filenames, alternate broken frame behavior or super-squeeze files.

The mp3 packer will process all audio files in the selected directory and display information about the size gain at the end.

Another interesting option of Mp3 Packer is the ability to create profiles. This can be useful to make sure that the mp3 files will always be packed using the exact same settings. MP3 Packer is a portable application which means it can be run without installation.