Convert MP4 to AAC
Free, fast MP4-to-AAC conversion.
Video and audio are processed with ffmpeg in your browser — large files are slow and use a lot of memory. Keep files under a few hundred MB for best results.
About the MP4 and AAC formats
MP4. MP4 is the most widely-supported video container, ideal for sharing and streaming.
AAC. AAC is a modern lossy codec offering better quality than MP3 at similar sizes.
Frequently asked questions
How do I convert MP4 to AAC?
Drop your MP4 files into the box above and click Convert. The AAC file is generated instantly and ready to download.
Will the quality stay the same?
AAC keeps full quality, so your converted file looks identical to the original.
Is MP4 to AAC conversion free?
Completely free, with no sign-up, watermarks or file-size paywalls.