Advanced Audio Coding
The compressed audio format used by Apple Music, YouTube and most video.
- Type
- audio
- Best for
- good sound at small sizes
Drop your AAC and get an OPUS back, right here in this tab. Your own computer does the work, so nothing gets uploaded, and there's no paid version.
The compressed audio format used by Apple Music, YouTube and most video.
A modern open codec that sounds excellent at very low bitrates.
Both formats are compressed, so converting costs a little quality. Starting from the best copy you have and picking a higher bitrate under More options keeps that small.
Yes, completely. Every tool and every format is free, and there's no paid version, account, watermark or daily limit.
No. Your browser does the work on your own device, so your files stay with you. Closing the tab clears them from memory.
Yes. Drop as many as you like, and the results can be downloaded together as a ZIP.
Yes, in a current mobile browser. Large files are limited by how much memory your device can spare.
Both formats are compressed, so converting costs a little quality. Starting from the best copy you have and picking a higher bitrate under More options keeps that small.