AAC file format
Advanced Audio Coding · Audio · .aac
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AAC is a high-efficiency audio codec used by YouTube, iTunes and most streaming services.
Technical details
| Full name | Advanced Audio Coding |
|---|---|
| File extension | .aac |
| MIME type | audio/aac |
| Audio codecs we export | AAC |
| Best for | Streaming and mobile devices |
Last updated 2026-11-13
AAC conversions
AAC FAQ
What is a AAC file?
AAC (Advanced Audio Coding) is an audio format. AAC is a high-efficiency audio codec used by YouTube, iTunes and most streaming services.
How do I open a AAC file?
Most modern players such as VLC open AAC files. If yours doesn't, convert it to MP3 above, which plays on every device.
How do I convert a AAC file?
Drop the file into the converter on this page, choose the output format and click “Convert & download”. It's free and runs in your browser without uploading.
What is AAC best for?
Streaming and mobile devices.