Compress an audio file
Pick best quality (192 kbps), balanced (128 kbps) or maximum compression (64 kbps) and download a lighter MP3 with the real savings shown. You can upload several at once: they come back in a ZIP.
Your files never leave your device
How to compress an audio file
- 1
Upload the audio
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF or WMA.
- 2
Pick a mode
Best quality, balanced or maximum compression.
- 3
Download the MP3
With the original size, the new one and the real savings.
Why use this tool
Three clear modes
You choose the balance between quality and size; no magic promises.
Real results
You see the exact size achieved and the reduction percentage.
Private
Your audio never leaves your device: ffmpeg runs inside your browser.
Real engine
ffmpeg, the industry standard, compiled to WebAssembly and self-hosted.
Frequently asked questions
How much smaller will it get?
It depends on the source: WAV or FLAC often shrinks by more than 80%; an already-compressed MP3 shrinks less. You always see the real result.
Does it lose quality?
Best quality (192 kbps) is practically transparent to most ears; maximum compression (64 kbps) is audible. Choose based on the use case.
Which formats are accepted?
MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF and WMA. The output is always MP3, compatible with everything.