🗜️ Audio Compress
Reduce audio file size by choosing a format and bitrate. Files never leave your device.
Drop an audio file here, or click to select
MP3 · AAC · M4A · FLAC · WAV · OGG · Opus · AIFF
Frequently Asked Questions
Is my audio file uploaded to a server?
No. Compression runs entirely in your browser using FFmpeg WebAssembly. Your audio never leaves your device.
Which audio formats are supported?
MP3, AAC, OGG, and OPUS output formats are available. Most common input formats are accepted.
How do I choose the right bitrate?
128 kbps is good for music listening; 96 kbps suits podcasts; 64 kbps works for voice recordings. Lower bitrate = smaller file but lower quality.
Will compression reduce audio quality?
Yes, lossy compression reduces quality. The degree depends on your chosen bitrate. For archiving, use the highest bitrate that meets your size target.
Is there a file size limit?
No server-side limit. Very large audio files may be slower to process in-browser.
Is this tool free?
Yes, completely free. No account or sign-up required.