Audio Compressor
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Audio Compressor
- Add your audio file.
- Choose the bitrate (lower is smaller).
- Download the MP3.
Common uses
- Shrinking podcasts and recordings.
- Making voice memos email-sized.
- Saving space.
About this tool
Re-encode audio as MP3 at a chosen bitrate with LAME via FFmpeg WebAssembly. Lower bitrates make smaller files.
Next steps
Frequently asked questions
What bitrate should I choose?
96 kbps is fine for speech; 128 to 192 kbps for music.
What format is the output?
MP3.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.
Does it work offline?
Once the page has loaded, most tools keep working without a connection, because processing happens on your device.