Compress Audio Files
Shrink the file size of your songs, podcasts, and voice notes so they are easy to share and email. Processed securely inside your browser.
Choose an Audio file
Or drag and drop your file here
Processed securely on your device. No files are uploaded to our servers.
audio.mp3
Original Size: 0 MB
Lower bitrates create smaller files but reduce audio fidelity.
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Loading Audio Engine
Fetching local processing core...Compressing Audio...
Reducing bitrate locally...How to Use Compress Audio
Make audio files smaller so they're easy to send, upload or store.
Add Your Audio
Drop a song, podcast or recording (or an MP4 video).
Pick a Quality
64 kbps for voice, 128 kbps for most uses, 192+ for music.
Compress & Save
Download the smaller MP3.
Bitrates
64 – 256 kbps
Output
MP3
Speed
Fast
Works on
Phone & computer
Privacy
Files stay on your device
Price
100% free
Compress Audio: Quick Reference
The key numbers and facts in one place.
| 64 kbps | Voice only – about 0.5 MB per minute |
|---|---|
| 96 kbps | Podcasts – about 0.7 MB per minute |
| 128 kbps | Everyday music – about 1 MB per minute |
| 192 kbps | Good music quality – about 1.4 MB per minute |
| 256 kbps | Near original – about 1.9 MB per minute |
What Can You Use It For?
Popular ways people use Compress Audio.
Email Attachments
Get under email size limits.
WhatsApp & Chats
Send long voice notes easily.
Podcasts
Smaller episodes for hosting.
Storage
Save space on your phone.
Tips for the Best Result
- 64 kbps is fine for speech but not for music.
- Compressing an already-small file won't shrink it much.
- Keep your original if you might edit it later.
Frequently Asked Questions
Quick answers about Compress Audio.
It depends on the original. A 320 kbps song at 128 kbps is about 60% smaller.
At 128 kbps most people can't tell. 64 kbps is best kept for voice.
How much data is used per second of sound. Lower means smaller files.
No. Everything is processed inside your browser, so your audio never leaves your device.
The audio engine (about 30 MB) downloads once, then your browser remembers it, so the next files are much faster.
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