MP4 to AAC

Drop an MP4 and keep just the sound, saved as AAC.

Audio quality

Your file stays on your device. Nothing is uploaded.

Audio from an MP4 in three steps

Up to 500 MB.

The soundtrack is saved as a raw AAC file at the bitrate you choose (128, 192 or 320 kbps).

Just the sound, no video.

Only the soundtrack is processed, so this is much faster than converting the video, and the picture is left out.

AAC is the audio codec inside M4A and MP4 files, here as a raw .aac file. It sounds good at small sizes, but some apps only open it wrapped as M4A.

For speech, like a talk or interview you'll transcribe, a low bitrate is plenty; for music, pick a higher one.

Animated, word-synced captions in the styles top creators use. Upload a video, pick a style, fix any word, and export.

Can I get just the audio from an MP4?

Yes. Drop the MP4 here and download the AAC; the video is left out.

Is AAC the right format?

AAC works well if your app supports it. MP3 is the safest choice for sharing.

How long does it take?

Usually seconds to a minute, because only the audio is converted.

Is my file uploaded?

No. It's processed in your browser, on your own device, and never leaves it.