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ConvertAnyVideo

WebM to M4A Converter

Extract the audio from WebM videos and save it as M4A. 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 WebM to M4A

  1. Add your WebM files

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

  2. M4A is selected

    The output is already set to M4A. Open Advanced settings if you want to change the bitrate or trim the audio.

  3. Convert and download

    Click Convert. Your M4A file is ready in moments — nothing is uploaded.

About the formats

WebM

WebM Video

WebM is an open, royalty-free format made for the web. It uses VP8/VP9 video with Opus or Vorbis audio and plays directly in modern browsers.

M4A

MPEG-4 Audio

M4A is AAC audio in an MP4 container. It sounds better than MP3 at the same size and is the default on Apple devices.

Frequently asked questions

How do I convert WebM to M4A?

Click “Choose Files” and select your WebM file (or drag it onto the page). M4A is already selected as the output, so just click Convert and download your M4A 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 WebM 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 WebM to M4A 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 WebM files at once?

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

Convert WebM to other formats

Convert other formats to M4A