Compress Audio
Make audio files smaller by lowering the bitrate or converting to mono — ideal for voice notes and podcasts.
- Processed locally — your files never leave your device
- Free, no sign-up
- No file limits
How to use Compress Audio
- 1
Drop an audio file into the box above.
- 2
Choose a bitrate, output format and optionally mono.
- 3
Click Compress and download the smaller file.
Features
- Huge savings on WAVUncompressed WAV recordings often shrink by 90% or more.
- Mono for voiceVoice recordings rarely need stereo; mono halves the size.
- MP3 or AACExport MP3 for compatibility or M4A (AAC) for better quality at low bitrates.
- PrivateEverything runs locally in your browser.
Frequently asked questions
What bitrate should I choose?
64–96 kbps mono is great for speech and podcasts. For music, 128–160 kbps stereo keeps good quality at a small size.
Why didn’t my MP3 get much smaller?
If the original is already at a low bitrate, there’s little left to save. Try a lower bitrate or mono.
Is my audio uploaded?
No. Compression happens in your browser and your file never leaves your device.