🎵 Audio Compressor
★★★★½ 4.6 (289 ratings)

🔒 Client-side — Your data never leaves your browser ✅ 100% Free — No signup, no limits ⚡ Instant — No server processing

Q: How does audio compression work?

Audio compression reduces file size by lowering bitrate, sample rate, or merging channels. Lower bitrate means smaller files but reduced quality.

Q: What audio formats are supported?

Input supports MP3, WAV, OGG, AAC, FLAC, M4A. Output depends on browser, typically MP3, WebM (Opus), and OGG (Opus).

Q: Will compression reduce audio quality?

Some quality reduction is inevitable with lossy compression. 128kbps MP3 is virtually indistinguishable from original for most listeners.

❓ FAQ

How does audio compression work?

Audio compression reduces file size by lowering the bitrate, sample rate, or merging channels. Lower bitrate means smaller files but reduced audio quality. This tool uses the browser's MediaRecorder API for encoding, all processing is done locally.

What audio formats are supported?

Input supports MP3, WAV, OGG, AAC, FLAC, M4A and other common formats. Output format depends on browser support, typically MP3, WebM (Opus), and OGG (Opus). Chrome/Edge support the widest range of output formats.

What bitrate should I choose?

Recommendations: 64-96kbps for voice/podcasts, 128kbps for general music, 192-320kbps for high-quality music. Mono files are about half the size of stereo files.

Is my audio file safe?

Completely safe. All computation happens on your device — Output Format, Sample Rate and other inputs stay in your browser using Web Audio API and MediaRecorder API. Your audio files are never uploaded to any server.

Will compression reduce audio quality?

There will be some quality reduction, which is inevitable with lossy compression. Lower bitrates reduce audio detail, but 128kbps MP3 is virtually indistinguishable from the original for most listeners.