Audio Compressor
Reduce audio file size by choosing a lower bitrate. Converts to MP3, processed in your browser.
Processed in your browser and never uploaded. Works best with files up to about 500 MB.
Files are processed on your device and never leave it.
No upload wait, results appear right in your browser.
No sign up, no watermark and no limits.
How to use Audio Compressor
Audio size depends mostly on bitrate. 128 kbps MP3 sounds good for most music and is much smaller than WAV.
- Choose a bitrate, or a target size, and mono for voice recordings.
- Click the box or drop your audio files.
- Wait while the audio is encoded to MP3 on your device.
- Download the compressed MP3.
Frequently Asked Questions
Is this Audio Compressor free?
Yes. Audio Compressor is completely free, with no sign up, no watermark and no daily limit.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files are never uploaded, stored or seen by anyone.
Why does it take longer than image compression?
Video and audio are re-encoded on your own device. Speed depends on your processor and the length of the file, so long videos can take several minutes.
Does it work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.