Skip to content
Cifrivo
Audio

Compress audio

Reduce MP3, WAV or M4A file size with high, balanced or maximum compression.

FreeNo sign-upLocal processing

Your files are processed locally and never leave your device.

Drop your audio files here

Choose files from your device. URLs and platform downloads are not accepted. Up to 10 files, 100 MB each and 300 MB in total.

How it works

  1. Select the files accepted by Compress audio.
  2. Choose the output and quality options.
  3. Start local processing and follow the real progress.
  4. Review the actual result and download it.

Practical example

Select a file in Compress audio, choose 192 kbps when available and compare the real input and output sizes after processing.

Formula and explanation

Compression works by re-encoding the input as MP3 at 256, 160 or 96 kbps. Results depend on the source codec and bitrate.

Supported path: MP3, WAV, M4A → MP3. Compatibility also depends on the codec contained in each file.

Processing runs with FFmpeg WebAssembly inside this browser. Files are not uploaded to Cifrivo or a third-party service.

Frequently asked questions

Is Compress audio free?

Yes. It is free and requires no account.

Are my files uploaded?

No. All decoding, encoding and downloads happen locally in your browser.

Which formats are supported?

This tool supports MP3, WAV, M4A → MP3. A valid extension, MIME type and file signature are checked first.

Audio

Change audio bitrate

Re-encode MP3 audio at 64, 96, 128, 192, 256 or 320 kbps and compare actual size.

Audio

Audio cutter

Choose a precise start and end point, preview your audio and export the selected segment.

Audio

MP4 to MP3

Convert an MP4 video into an MP3 audio file with selectable bitrate and optional trimming.

Audio

WAV to MP3

Compress WAV audio into MP3 and compare the actual original and final file sizes.