MP3
MP3は、Fraunhofer Societyが開発した非可逆圧縮を用いたデジタルオーディオのフォーマット規格である。正式名称はMPEG-1 Audio Layer IIIまたはMPEG-2 Audio Layer III。
M4A
M4Aは、Advanced Audio Codec（AAC）を使用してデジタルオーディオデータを圧縮するオーディオフォーマットです。MP3の後継であり、ファイル名の拡張子は.m4aです。
Convert MP3 to M4A online
Use this MP3 to M4A converter when you need an AAC-based audio file for Apple devices, music libraries, messaging apps, or workflows that prefer the M4A container. Upload your MP3 file, choose M4A as the output format, and download the converted audio when processing finishes.
Convertr runs the conversion in your browser workflow with no software install or account required. Files can be up to 1 GB and are automatically deleted after conversion.
How to convert MP3 to M4A
- Upload your MP3 file to the converter.
- Select M4A as the output format.
- Start the conversion and download your new M4A file when it is ready.
MP3 to M4A FAQ
Why convert MP3 to M4A? M4A commonly stores AAC audio, which is widely supported by Apple devices and can provide efficient audio quality at practical file sizes.
Will converting MP3 to M4A improve quality? Converting cannot restore audio detail already removed from the MP3 source, but it can create an M4A file for apps or devices that prefer that format.
Can I convert large MP3 files? Yes. Convertr supports uploads up to 1 GB, so long audio files can be converted when they fit within that upload size.