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Compression reduces the bitrate. A 50 MB WAV becomes 5 MB in MP3 128 kbps, with barely perceptible loss on standard headphones. At 320 kbps, the human ear can no longer tell the difference from the original.
Free, no account required, browser processing and no server upload.
Drop a file — Compress audio
Drag and drop your file here · Choose a file from your device
Max 100 Mo
Compression reduces the bitrate. A 50 MB WAV becomes 5 MB in MP3 128 kbps, with barely perceptible loss on standard headphones. At 320 kbps, the human ear can no longer tell the difference from the original.
Bitrate/quality trade-off
320 kbps
Near CD (very good)
Archiving, audiophile listening
192 kbps
Good
Podcasts, everyday music
128 kbps
Average
Audiobooks, conferences
64 kbps
Poor
Dictaphone, voice memo
Compressing an already compressed file (MP3 to smaller MP3) degrades quality more than compressing from a lossless format. Always start from the original source file.
You just recorded a podcast on your phone in WAV (raw format). The file is 120 MB for 30 minutes. Compress it to MP3 128 kbps: you get a 14 MB file, perfect for email or blog hosting.
Compress audio helps you complete this task directly in your browser. You keep control of your data and get the result locally.
Yes. Compress audio is free to use and runs in your browser without sending files or content to Lmaotools servers for processing or storage.
No. Files and content added to the tools are processed in your browser. They are not sent to Lmaotools servers for conversion or storage.
No. Open the tool, add your file or content, then get the result. Processing happens locally in your browser.