Audio Compressor
Re-encode MP3, WAV, M4A, FLAC and AAC files at a lower bitrate to save space for podcasts and mobile storage.
Select files for Audio Compressor
Drag & drop your files here, or click to browse
- Audio is re-encoded at the selected bitrate (MP3 via LAME, M4A as AAC). Lower bitrates and mono reduce size the most.
How to use Audio Compressor
From upload to download in 3 steps.
- 1
Add your files
Choose or drag up to 10 MP3, WAV, M4A, FLAC, AAC, OGG and 1 more files into the upload area (up to 300 MB each).
- 2
Adjust the settings
Optionally change the output 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
- MP3WAVM4AFLACAACOGGAIFF
- Output formats
- MP3M4A
- Limits
- Up to 300 MB per file
- Up to 10 files per job
- Files are deleted automatically after processing
- Output Format
- MP3 and M4A
- 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 Audio 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 Audio Compressor support?
Audio Compressor accepts MP3, WAV, M4A, FLAC, AAC, OGG and AIFF files. It produces MP3 and M4A.
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 Audio Compressor work, and what are its limitations?
Audio is re-encoded at the selected bitrate (MP3 via LAME, M4A as AAC). Lower bitrates and mono reduce size the most.
Is Audio Compressor free to use?
Yes. Audio Compressor is free, needs no account, and does not add watermarks to your files.
Related Tools
Tools that work with the same formats as Audio Compressor
MP3 Compressor
Reduce MP3 file sizes by tuning bitrate and sample frequencies.
WAV Compressor
Downsample and compress uncompressed WAV audio files.
Audio Converter
Convert sound tracks and music files between MP3, WAV, AAC, M4A, FLAC, and OGG.
MP3 Converter
Convert audio files and video soundtracks to MP3, with a choice of bitrate, sample rate and channels.