Convert MP4 to AAC

Takes the audio track out of the video and keeps it as AAC, which is most likely what it already was. Useful when you want the sound as a standalone file without changing codec families.

Drop MP4 file(s) to start

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What is MP4?

The container video actually travels in: what phones record, what messaging apps accept, what every player since the iPod era opens. It usually carries H.264 video and AAC audio. Its one structural quirk matters to converters - the index of every frame lives in a table that has to be exactly right, or nothing plays.

What is AAC?

MP3's designated successor and the audio in most video - YouTube, streaming services, broadcast, virtually every MP4. At a given bitrate it beats MP3 audibly, especially below 128kbps, and every phone and browser decodes it.

Your files never leave your device · no magic required