compress Compress Audio

Shrink an audio file's size.

Runs entirely in your browser, your audio is never uploaded. Free, instant, no signup.

upload_file Upload Audio

lock Your audio is processed locally and never uploaded.
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Choose Your Bitrate

Lower bitrates make smaller files at some quality cost. 128 kbps is a good default for most uses.

How to Use

  1. 1

    Choose your audio file. Click "Choose File" and pick an audio file from your device.

  2. 2

    Pick a target bitrate. Lower means smaller file, higher means better quality.

  3. 3

    Click Compress Audio. The first use downloads the audio engine, so give it a few extra seconds.

  4. 4

    Download the result. Click the download link, no email or account needed.

Frequently Asked Questions

No, compression happens entirely inside your browser. Your file is never sent to a server.
128 kbps is a good balance of size and quality for speech and music. Use 64-96 kbps for smaller files, or 192 kbps for higher quality.
The compressed file is always saved as MP3, regardless of your input format.