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ConvertAnyVideo

MP4 to AAC Converter

Extract the audio from MP4 videos and save it as AAC. Pick the bitrate, trim the start and end, and download in seconds.

or drop files here

Up to 1 GB per file · Files never leave your device

  • 100% free
  • No sign-up
  • No upload — private
  • No watermark

How to convert MP4 to AAC

  1. Add your MP4 files

    Click “Choose Files” or drag and drop your MP4 videos onto this page.

  2. AAC is selected

    The output is already set to AAC. Open Advanced settings if you want to change the bitrate or trim the audio.

  3. Convert and download

    Click Convert. Your AAC file is ready in moments — nothing is uploaded.

About the formats

MP4

MPEG-4 Part 14

MP4 is the most widely supported video format today. It usually stores H.264 or H.265 video with AAC audio and plays on almost every phone, browser, TV and editing app.

AAC

Advanced Audio Coding

AAC is the audio codec used by YouTube, iPhone and most streaming services. It gives great quality at small file sizes.

Frequently asked questions

How do I convert MP4 to AAC?

Click “Choose Files” and select your MP4 file (or drag it onto the page). AAC is already selected as the output, so just click Convert and download your AAC file when it’s ready.

Will the audio quality change?

The audio is saved at high quality (192 kbps by default). If the video’s soundtrack is already in a compatible format, it is copied without any quality loss.

Is it safe to convert MP4 files here?

Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.

Is the MP4 to AAC converter free?

Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.

Can I convert several MP4 files at once?

Yes. Add as many MP4 files as you like and convert them in one go, then download them one by one or together as a ZIP file.

Convert MP4 to other formats

Convert other formats to AAC