Compress MP3
Free, fast and secure: shrink your MP3 file right in your browser.
MP3
Make your MP3 smaller without changing its format
Compressing MP3 re-encodes the audio at a lower bitrate in the same format, so songs, podcasts and voice notes take up less space, upload faster and fit attachment limits, while still sounding clear.
How to compress MP3
- 1 Drop your MP3 file into the compressor above.
- 2 Pick a compression level and it is optimised automatically.
- 3 Download your smaller MP3 file instantly.
About MP3
MP3
MP3 audio
MP3 is the world’s most compatible audio format. Its lossy compression makes small files that play on every device and app, which is why it is still the default for music and podcasts.
Strengths
- Plays on virtually everything
- Small, convenient files
- Adjustable bitrate
Limitations
- Lossy: discards some audio detail
- Not ideal for archiving
- No lossless option
Best for: Music, podcasts and voice that need to play everywhere at a small size.
Frequently asked questions
Upload your MP3 file above, pick a compression level and it is optimised automatically. When it is ready, download your smaller file: the whole thing takes just a few seconds in your browser.
You choose the balance between size and sound. “Light” stays close to the original, while “Strong” maximises the saving. If your file already uses a low bitrate, we keep your original instead of making it larger.
It depends on the file and the level you pick, but savings of 40–80% are common: larger, less-optimised files shrink the most.
Yes. The compressor is free to use, with no watermark and no sign-up required.
Your files are processed securely and are never shared with anyone.