Audio Compressor

Reduce audio file size by lowering sample rate, converting to mono, and re-encoding — all in your browser.

Browser-based compression: Audio is decoded, resampled, optionally down-mixed to mono, then re-encoded as WAV (smaller sample rate / mono) or WebM/Opus (lossy compression). No files leave your device.

Upload Audio

Drag & drop files here, or click to browse

Max 1 file, up to 100.0 MB each

Compression Settings

Output Format

WebM/Opus gives much smaller files

Sample Rate

Channels

Bitrate: 64 kbps

16 kbps256 kbps