.aac Advanced Audio Coding (raw ADTS)
AAC Converter
AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Working…
Keep this tab open — the conversion runs on your device, nothing is uploaded.
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✓ Done — your files are saved to Downloads
Add more files above to keep converting.
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AAC at a glance
| Full name | Advanced Audio Coding (raw ADTS) |
|---|---|
| Type | Audio |
| Compression | Lossy (compressed) |
| Developed by | MPEG |
| Introduced | 1997 |
| File extension | .aac |
| Plays on iPhone | ✓ Yes |
| Plays on Android | ✓ Yes |
| Plays on Windows | ✓ Yes |
| Plays on Mac | ✓ Yes |
AAC is best for efficient music files and broadcast audio.
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Convert AAC to…
Convert to AAC from…
MP3 to AACM4A to AACM4R to AACALAC to AACWAV to AACFLAC to AACOGG to AACOPUS to AACWEBA to AACWMA to AACAIFF to AACAC3 to AACCAF to AACAMR to AAC3GA to AACAPE to AACMP4 to AACMOV to AACMKV to AACWEBM to AACAVI to AACFLV to AACWMV to AAC3GP to AACM4V to AACMPG to AACTS to AACGIF to AACMTS to AACVOB to AACHEVC to AACRMVB to AAC
Frequently asked questions
What is a .aac file?
AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.
How do I open a AAC file?
On a computer, VLC Media Player opens almost any .aac file. On phones, the quickest fix is to convert it to MP3 or M4A above. Those formats play in every music app.
Can I convert AAC for free?
Yes. The converter on this page is free and unlimited, and it works without uploading anything.