Convert MP4 to AAC
Fast, free MP4 to AAC conversion — works in any browser
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mp4
The format within the MPEG-4 Part 14 standard
| File extension | .mp4 .m4v |
|---|---|
| File category | video |
| Programs | VLC media player Windows Media Player Apple QuickTime Player MPV Kodi |
| Tech description | https://en.wikipedia.org/wiki/MPEG-4_Part_14 |
| MIME type | video/mp4 |
| Developer | MPEG group (ISO/IEC) |
Created in 1988, it was intended for video files. A file of this format contains video and audio information, images and subtitles. When compressed, the files do not lose quality. The format includes various types of multimedia content: videos, animations, audio, 2D and 3D graphics. Files of this format can be used and viewed on the Internet. In this case, a metadata transfer takes place. The full name of the format is MPEG-4 Part 14.
aac
Advanced Audio Coding (AAC)
| File extension | .aac |
|---|---|
| File category | audio |
| Programs | Apple iTunes VLC media player Windows Media Player Winamp foobar2000 |
| Tech description | https://en.wikipedia.org/wiki/Advanced_Audio_Coding |
| MIME type | audio/aac |
| Developer | AT&T Bell Labs, Fraunhofer IIS, Dolby, Sony |
AAC (Advanced Audio Coding) is a lossy audio compression format standardized by the MPEG group in 1997, designed as the successor to MP3. At the same bitrate, AAC delivers noticeably better audio quality thanks to improved psychoacoustic modelling, support for up to 48 audio channels, and sampling frequencies from 8 to 96 kHz. AAC is the default audio format on Apple devices, iOS, iTunes, and YouTube. Files typically use the .aac or .m4a extension. Developed jointly by AT&T Bell Labs, Fraunhofer IIS, Dolby, and Sony, AAC is natively supported on Android, iOS, Windows, macOS, and most modern media players.
FAQ
How to convert AAC to MP4?
Upload your AAC file, select MP4 as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert AAC to MP4?
Most AAC files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert AAC files online?
Yes. All uploaded AAC files and converted MP4 results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert AAC on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the AAC file and convert to MP4 without installing any app.


