Audio Compressor
Last updated: June 1, 2026In-browserReduce audio file size.
Audio Compressor is a free online tool to reduce audio file size. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Audio Compressor
The Audio Compressor reduces the size of MP3, WAV, M4A and other audio files by lowering the bitrate — ideal for fitting voice notes, podcasts and music under email and upload limits. It runs privately in your browser with no upload and no watermark.
Read the full guide: How to Compress Audio Files (Reduce Size, Free)
- 1Drop in your audio file.
- 2Choose a lower bitrate to shrink the file.
- 3Compress and download the smaller audio.
Smaller files fast
Lower the bitrate to cut audio size for email, messaging and uploads.
You control quality
Pick the bitrate that balances size against how the audio sounds.
Private and free
Compression runs on your device — no upload, no watermark.
Audio Compressor — frequently asked questions
How do I make an audio file smaller?
Drop it in, choose a lower bitrate (like 128kbps or 96kbps), then download the compressed file.
Will compressing hurt the sound?
Lower bitrates trade some quality for size. 128kbps is fine for speech; keep it higher for music.
What files can I compress?
MP3, WAV, M4A and other common audio formats.
Is it free?
Yes — free, no watermark and no sign-up.
Is my audio uploaded?
No, it's processed entirely in your browser.
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Send it to someone who needs it or save the link for later.
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