How do I convert MP3 to AAC?

Upload your MP3 file using the box above, confirm AAC as the output format, then select Convert. The converted file is ready to download as soon as processing finishes — usually in a few seconds.

Is converting MP3 to AAC free?

Yes, and there is nothing to sign up for. Every conversion is free, there is no paid tier, and the limits are the same for everyone.

Will the quality change when converting to AAC?

AAC uses lossy compression, so some data is discarded to keep the file small. The default quality setting is tuned to be visually or audibly transparent for most material, and you can raise it in the conversion settings.

What happens to my file afterwards?

The uploaded file is deleted as soon as the conversion completes, and the converted file is removed automatically once its retention window ends. Download links are signed and expire within minutes.

mp3aac

Convert MP3 to AAC

Free online converter for MP3 files. Efficient successor to MP3 used in broadcast and streaming. Nothing to install, no watermark, and every file is deleted automatically.

Drag and drop your files

Upload a MP3 file to convert it to AAC. Up to 200 files at once, 10 GB each.

Free · up to 200 files · 10 GB each · files deleted automatically after 168 hours.

About MP3 and AAC

MP3

The most widely compatible lossy audio format.

audio/mpeg

AAC

Efficient successor to MP3 used in broadcast and streaming.

audio/aac

Other MP3 conversions

mp3 to wav
mp3 to flac
mp3 to ogg
mp3 to opus
mp3 to m4a

Other ways to get AAC

wav to aac
flac to aac
ogg to aac
opus to aac
m4a to aac
mp4 to aac
webm to aac
mkv to aac