Compress an MP3 to a smaller size

Pick a target bitrate and get a smaller MP3, with the size difference shown before you keep it.

Tap to choose files, or drop them here

MP3 files

Lower bitrate means a smaller file and less detail. Spoken voice survives 32 to 64 kbps well; music usually wants 96 kbps or more.

Your files never leave your device. This tool runs entirely in your web browser. Nothing is uploaded, nothing is stored, and there is no account to create. Close the tab and the file is gone from here too.

How it works

  1. Add your file using the box above, or drag and drop it in.
  2. Choose your options, if the tool has any.
  3. Press the button, and your finished file downloads right away.

The whole job happens on your own device, usually in a few seconds. There are no queues and no watermark added to your file.