MP3 Compressor
Downsize podcasts, audiobooks, and songs by re-encoding at a lower bitrate (e.g. 320 → 96 kbps) or in mono.
Select files for MP3 Compressor
Drag & drop your files here, or click to browse
- If you choose a bitrate at or above the source bitrate, the file will not get smaller — the report shows the real result.
How to use MP3 Compressor
From upload to download in 3 steps.
- 1
Add your files
Choose or drag up to 10 MP3 files into the upload area (up to 300 MB each).
- 2
Adjust the settings
Optionally change the target format, audio bitrate, channels and 1 more — the defaults work well for most files.
- 3
Compress and download
Click Compress, follow the progress, and download the result — several files are bundled into one ZIP. Files are deleted from the server automatically afterwards.
Supported formats and settings
- Input formats
- MP3
- Output formats
- MP3
- Limits
- Up to 300 MB per file
- Up to 10 files per job
- Files are deleted automatically after processing
- Audio Bitrate
- 192 kbps, 160 kbps, 128 kbps, 96 kbps, 64 kbps, 48 kbps and 1 more
- Channels
- Original, Stereo and Mono
- Sample Rate
- Original, 48 kHz, 44.1 kHz, 32 kHz, 22.05 kHz, 16 kHz and 1 more
Why use our MP3 Compressor?
Genuine Processing
Real conversions by proven engines — never renamed copies or fake results.
Private by Design
Files are deleted automatically after processing and never used for training.
Free to Use
No account, no subscription and no watermarks on your files.
Frequently Asked Questions
Which file formats does MP3 Compressor support?
MP3 Compressor accepts MP3 files. It produces MP3.
Is there a file size limit?
Each file can be up to 300 MB, and you can process up to 10 files at once. Larger files take longer to upload and process.
What happens to my files?
Files are uploaded only when you start processing. They are stored under random names in a private temporary folder, processed, and deleted automatically shortly afterwards — the exact time is shown with your result — or immediately when you click “Delete files now”. Files are never shared or used for training.
How does MP3 Compressor work, and what are its limitations?
If you choose a bitrate at or above the source bitrate, the file will not get smaller — the report shows the real result.
Is MP3 Compressor free to use?
Yes. MP3 Compressor is free, needs no account, and does not add watermarks to your files.
Related Tools
Tools that work with the same formats as MP3 Compressor
Audio Compressor
Reduce audio file size by re-encoding at a lower bitrate.
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WAV Compressor
Downsample and compress uncompressed WAV audio files.
AAC Converter
Convert audio files to AAC (Advanced Audio Coding), a format supported by most phones, browsers and media players.