Online Audio Compressor
Reduce audio file sizes for faster email attachments, podcast feeds, and Discord uploads. All psychoacoustic processing happens locally in your browser memory.
Upload Audio File to Compress
Reduce audio file size for podcasts, emails, and web streaming · 100% In-Browser
Understanding Audio Compression: Honest Numbers
How much file size you can save depends directly on your source audio format:
Standard CD quality WAV is uncompressed PCM at 1,411 kbps (~10.5 MB per minute). Compressing to a 128 kbps MP3 drops the bitrate by 91% down to ~0.95 MB per minute with virtually no perceivable difference on standard speakers and headphones.
If your file is already an MP3 (e.g. 320 kbps), re-encoding to 128 kbps saves 60% of disk space. Converting a stereo podcast to mono voice drops another 50%, producing massive savings for audiobooks and voice memos.
Frequently Asked Questions
Will compressing my audio make it sound muffled?
At 128 kbps and 192 kbps, our psychoacoustic encoder removes only inaudible frequency masks, retaining clear dialogue, crisp cymbals, and warm bass. For speech recordings, 64k mono offers exceptional intelligibility at microscopic file sizes.
Why does downmixing to mono help compression?
Stereo files store separate audio information for both left and right speakers. For spoken word content like lectures or podcast interviews, both channels carry identical speech. Downmixing to mono halves the data bandwidth with zero loss in vocal clarity.
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Combine and stitch multiple audio tracks into a single seamless continuous audio file with drag-and-drop reordering.
Separate vocals and backing music from any song using browser-accelerated deep audio stem separation.
Downmix dual-channel stereo tracks or extract left/right isolated channels into clean, phase-aligned mono audio.
Rip high-fidelity audio tracks from video files (MP4, MOV, WEBM, MKV) directly without re-encoding delays.