Audio

The AAC format

The successor to MP3, used by YouTube, Apple Music and digital broadcasting. An .aac file contains the “bare” audio stream, with no container.

Drop your files hereor (AAC and over 40 other formats). You can also paste an image.No upload: everything happens on your device

Fact sheet

AAC

Advanced Audio Coding (ADTS stream)

Best for: Good-quality audio in light files.
Limits: Some programs prefer the same audio inside an M4A.
Compression: lossy
Typical bitrate: 96-256 kbps
Compatibility: excellent
Extensions: .aac
MIME type: audio/aac
Since: 1997

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Tools for AAC files

Questions about the AAC format

How do I open a AAC file?

Usually a double click is enough: operating systems and the most common programs recognise it. If the program or website you use won’t accept it, you can convert it here to a more common format, for example MP3.

What extension do AAC files have?

.aac. The MIME type is audio/aac.

Does converting a AAC lose quality?

It depends on the target format: to lossless formats (PNG, FLAC, WAV) nothing is lost; to compressed formats (JPG, MP3, MP4) you can choose the quality to balance size and result.