Convert MP3 to AAC

MP3 vs AAC: what is the difference?

The most widely used lossy format, playable on nearly every device and app. A lossy codec that is more efficient than MP3 at the same bitrate.

What happens to the sound quality?

Both MP3 and AAC are lossy, so each conversion costs a little more quality. Convert from the original if you have it.

How much will the file size change?

For a 3-minute stereo track, MP3 is about 4.3 MB and AAC is about 4.3 MB. Actual sizes depend on the track and settings.

When should you choose AAC?

AAC is a good fit when you want better quality at the same size.

FAQ

Does converting MP3 to AAC reduce the sound quality?

Both MP3 and AAC are lossy, so each conversion costs a little more quality. Convert from the original if you have it.

Are my files uploaded to a server?

Files never leave your device; everything runs in your browser.

What is the AAC format used for?

A lossy codec that is more efficient than MP3 at the same bitrate. AAC is a good fit when you want better quality at the same size.