Convert MP3 to AAC online, free

Pour iPhone et iTunes — processed on our secure servers in France. Files deleted after conversion, no sign-up.

Drop your MP3 file here

or click to choose a file — conversion to AAC

With NoLimit: unlimited files and every format unlocked

MP3 vs AAC — technical comparison

FeatureMP3AAC
Full nameMPEG Audio Layer IIIAdvanced Audio Coding
TypeAudioAudio
CompressionLossyLossy
Common useMusic, podcasts, sharingApple, streaming

Frequently asked questions

How to convert MP3 to AAC?+

Drop your MP3 file in the zone above, or click to select it. The AAC conversion starts automatically on our secure servers — no software to install.

Is converting MP3 to AAC secure?+

Yes. ConvertLab processes your files on secure servers located in France, over an encrypted connection. They are never shared with any third party and are deleted immediately after the conversion.

Is there quality loss when converting MP3 to AAC?+

AAC uses lossy compression. Final quality depends on the compression rate you choose.

What is the maximum file size?+

Since the conversion runs on our servers, the limit no longer depends on your device. Files up to 100 MB are accepted. With NoLimit, up to 1 GB per file (250 MB for video).

Need the reverse?Convert AAC to MP3 →