Audio Compressor
Choose a compression level and output format to reduce file size while preserving the sound you need.
Drop an audio file here, or choose a file
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, WebM, WMA · up to 100 MB
Audio Compressor
Audio Compressor is a free online tool for reducing MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WebM, or WMA audio to a smaller file.
Choose from four compression and quality levels, then export to MP3, M4A, OGG, or Opus. FFmpeg.wasm performs all decoding and encoding locally in your browser.
How to Use
- Choose one audio file no larger than 100 MB
- Select MP3, M4A, OGG, or Opus as the output format
- Choose the compression and quality preset you need
- Compress the audio, compare the before and after sizes, and download the result
FAQ
Is my audio file uploaded to a server?
No. Reading, decoding, compression, preview, and download all happen in your current browser.
Which compression and quality level should I choose?
Lower quality uses a lower target bitrate and usually creates a smaller file. Speech can use stronger compression, while music is best started at Balanced or High quality.
Which audio formats can I compress?
The tool reads MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WebM, and WMA, then exports MP3, M4A, OGG, or Opus.
Why might the compressed file not be much smaller?
If the original already uses a low bitrate, re-encoding at a higher quality can produce a file close to the original size or even slightly larger.