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MP4 to AAC converter

Convert MP4 to AAC for free, right in your browser. Your files never leave your device.

    Converted on your device · never uploaded · Free limits

    Where it runs
    On your device
    Free allowance
    Unlimited
    Typical time
    Usually under 5 seconds
    Sign-up
    Not needed

    What happens to your MP4

    Only the soundtrack is kept and the picture is dropped. The audio is saved as AAC at a high bitrate, so it sounds the same as the video.

    This conversion runs inside your browser, so the file is never uploaded. Files over 300 MB are sent to our server instead, and deleted within 60 minutes.

    How to convert MP4 to AAC

    1. Choose your file Tap Choose files and pick the MP4 file, or drop it onto the page. You can add several at once.
    2. Convert to AAC The conversion starts on your device straight away. Nothing is uploaded.
    3. Download Tap Download to save the result.

    What is an MP4 file?

    The universal video format. MP4 with H.264 plays on every phone, browser, TV and social network.

    Every phone, browser and media player plays MP4.

    More about MP4 files

    What is an AAC file?

    Raw AAC audio, the successor to MP3 used by YouTube, iTunes and most streaming services.

    VLC, iTunes, Android and most modern players open AAC.

    More about AAC files

    Questions

    Is converting MP4 to AAC free?

    Yes, completely. This conversion runs on your device, so there is no daily limit and no sign-up. We never ask you to pay after you have converted.

    Is it safe to convert my MP4 files here?

    Yes. The conversion happens inside your browser, and the file never leaves your phone or computer.

    How long does MP4 to AAC take?

    Usually under 5 seconds. Bigger files take longer, and you can watch the progress on each file.

    Can I convert MP4 to AAC on my iPhone or Android phone?

    Yes. The converter works in Safari, Chrome and any modern browser. Tap Choose files, pick from Photos or Files, and download the result to your phone.

    How do I open an AAC file?

    VLC, iTunes, Android and most modern players open AAC.

    Convert MP4 to other formats

    Convert other files to AAC