Compressors
MP3 Compressor
Reduce the size of your MP3 file by re-encoding at a lower bitrate. Choose from presets ranging from maximum compression to best quality.
Compression quality
🔒 Your audio files are processed locally in your browser and are never uploaded to any server.
How to use
- 1.Choose preset — Select a compression preset based on your needs — Balanced is a good default for most uses.
- 2.Upload MP3 — Drop your MP3 file or click to browse.
- 3.Compress — Click "Compress MP3". The tool re-encodes at the selected bitrate.
- 4.Check reduction — The file info shows original and compressed size. Download if the result meets your needs.
Features
Supported formats
FAQ
How much will my file be compressed?
The output size depends on your input file and the selected bitrate. A 10 MB MP3 at 320 kbps may compress to ~4 MB at 128 kbps. Actual results vary by content.
Which preset should I use?
For email attachments or web use: Balanced (128 kbps). For podcasts and voice: High compression (96 kbps). For music where quality matters: High quality (192 kbps) or Best quality (320 kbps).
Is lossy compression reversible?
No. MP3 compression is lossy and irreversible. Always keep a copy of your original file.