Convert M4A to AAC

M4A vs AAC: what is the difference?

AAC audio in an MP4 container, common on Apple devices and streaming services. A lossy codec that is more efficient than MP3 at the same bitrate.

What happens to the sound quality?

Both M4A 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, M4A 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 M4A to AAC reduce the sound quality?

Both M4A 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.