Free Audio Compressor
Reduce an audio file's size by lowering its sample rate and channels, directly in your browser.
Add an audio file to compress
Choose an MP3, WAV, OGG, M4A, or FLAC file.
Maximum 100 MBReduces file size by lowering sample rate and channels — not MP3-style lossy compression.
Processed in your browser. Your audio never leaves your device.
How to reduce an audio file's size
- Choose an audio file.
- Pick a lower sample rate and optionally mix down to mono.
- Select Compress audio.
- Download the smaller file.
How this works
Your browser decodes the audio, then re-renders it at a lower sample rate (and optionally as mono instead of stereo) using the Web Audio API, before encoding the result as a WAV file. Lowering the sample rate and channel count directly reduces the file size.
A note on scope
This is downsampling, not MP3-style perceptual compression — it reduces size by lowering audio resolution rather than using a lossy codec, since this tool doesn't include an MP3 encoder. For voice recordings and casual use, the size reduction is still significant with little audible difference.
Common use cases
- Shrink an audio file before sending it by email or message
- Reduce the size of a voice recording for storage
- Lower audio quality intentionally for a smaller download
Frequently asked questions
Is this audio compressor free?
Yes. It is completely free, with no signup and no limits.
Is my audio uploaded anywhere?
No. The audio is processed entirely in your browser. Nothing is sent to Inqita or stored.
Is this the same as MP3 compression?
No. This reduces file size by lowering the sample rate and channel count, not by using an MP3-style lossy codec. It's a legitimate way to shrink WAV files using only browser-native tools.
Will this noticeably reduce audio quality?
For voice recordings, the difference is usually minor. For music, lowering the sample rate significantly can be more noticeable.
What format is the output?
WAV, a universally supported, uncompressed audio format — just at a lower sample rate and/or channel count than the original.