Nothing is uploaded
The audio is processed by your own device, inside the browser. Your files never leave your computer or phone.
All tools › Audio tools
Online MP3 Compressor
Compress MP3 files online to reduce audio size for email, podcasts or storage. Lower the bitrate or switch to mono, balancing smaller files with the sound quality you need.
Drop files here or click to choose
MP3, WAV, M4A, FLAC… · up to 10 files · max 500 MB each
Key features
Up to 10 files at once
Drop a whole batch of files at once, up to 500 MB each, and download the results individually (one by one) or all together as a .zip.
Fast
Audio is light work on most devices: most files are processed in just a few seconds, with a progress bar for the longer ones.
Clean sound
A high-quality encoder (LAME for MP3, AAC, Vorbis, Opus, FLAC) at the bitrate you choose. Lossless formats stay lossless.
Simple options
MP3 Compressor asks only for what really matters and uses sensible defaults, so the first result is usually the right one.
Free, no account, no watermark
No sign-up required, no limits on the number of files, nothing extra added on your audio. Just a single ad keeps the site running.
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