Private by design

Compress Audio Files

Make MP3, WAV, M4A and FLAC files smaller by re-encoding at a lower bitrate, right in your browser — private and free.

Options

Your history 0 saved

Stored only in this browser (last 50 jobs). Nobody else can see it.
Work in progress

Your files are still being processed.

Side-by-side comparison
Original
Result

How to use

  1. Add one or more MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC and WEBA audio files — drag and drop, click to browse, or paste.
  2. Adjust the options, or keep the recommended defaults.
  3. Press “Compress” and download each result, or everything at once as a ZIP.

Formats & privacy

Input: MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC and WEBA

Output: MP3, M4A, OGG and OPUS

Files are processed on your device whenever your browser can do the job. A file only reaches our server when it is too large or needs a codec the browser lacks. Read the privacy details.

Frequently asked questions

Is Compress Audio Files free?

Yes. Compress Audio Files is free to use, with no sign-up, no watermark and no daily limit.

Are my files uploaded?

Usually not. Processing happens on your device in the browser. Only when your browser cannot handle a file (for example, a very large one) is it sent to our server, processed, and deleted automatically within 30 minutes.

Which formats are supported?

Input: MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC and WEBA. Output: MP3, M4A, OGG and OPUS.

Is there a file size limit?

Files up to 1024 MB are processed on your device. Larger files are handled by our server when it is available.

Can I process several files at once?

Yes. Add as many files as you like; they are processed in parallel and you can download them all as a single ZIP.