Reduce the Size of MP3 and Other Audio
The size of an MP3 depends on its bit rate: 128 kbps takes about 1 MB per minute, 320 kbps about 2.4 MB. Pick a lower bit rate to send a recording by email or messenger, or to save space on your phone.
For speech and podcasts 64–96 kbps in mono is plenty; for music 128–192 kbps keeps good quality. Any audio format can be compressed — the result is always MP3. Files are deleted from our server automatically after 48 hours.
Why Use This MP3 Compressor?
- Choose the bit rate and see the expected size
- Mono option for speech halves the size
- Compresses WAV, FLAC, M4A and others into MP3
- Free, no registration, no watermark
How to Compress MP3
- Select or drag your audio file into the upload area
- Choose the bit rate (and mono for speech)
- Click "Compress and download"
Frequently Asked Questions
Is this MP3 compressor free?
Yes, it is completely free, with no registration and no watermark.
Which bit rate should I choose?
128 kbps is a good balance for music; 96 kbps is fine for speech. Lowering the bit rate below the original one makes the file smaller; raising it does not improve the quality.
Which formats are supported?
MP3, WAV, M4A, OGG, FLAC, AAC, Opus, WMA, AMR and videos (MP4, MOV, MKV, WebM, AVI). The result is MP3.
Are my files safe?
Files are sent over an encrypted connection and deleted from our server automatically after 48 hours; you can delete them earlier in "Your files".