How to compress MP3
- 1
Add your MP3 files
Drag and drop MP3 files onto the compressor, paste them, or click to browse. You can add several at once.
- 2
Pick a level or a target
Balanced is selected and suits most files. Choose Light to stay closer to the original or Strong for the smallest file, or set a target size or a percentage to reduce by.
- 3
Compress
Click Compress. Your MP3 files are processed right in your browser, usually in seconds.
- 4
Download
Download each smaller MP3, or everything at once as a ZIP.
What compression does to MP3
Re-encodes at a lower bitrate (Light 192 kbps, Balanced 128 kbps, Strong 96 kbps).
- Light
- 192 kbps: indistinguishable from the original for most listeners.
- BalancedDefault
- 128 kbps, the default: fine for music on phones, laptops and earbuds.
- Strong
- 96 kbps: smallest file, best kept for speech and podcasts.
Common sizes
The compressor above takes any target size, or a percentage to reduce by. These pages preset the sizes people ask for most, for upload forms, email and chat limits.
MP3 · MPEG Audio Layer III
MP3 is the most compatible audio format in the world. Its lossy compression keeps music small enough to share while sounding close to CD quality.
- Type
- Audio
- Extension
- .mp3
- MIME
- audio/mpeg
- Best for
- music libraries, podcasts and audio for any device
Compressing MP3: frequently asked questions
Smaller MP3 files, in seconds.
No sign-up, no watermark, no upload. Drop a file and get it back lighter.
- Most conversions never leave your device
- Cloud files deleted automatically
- No watermarks