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AISS Convert

WEBM to MP4 Converter

Turn WEBM recordings into MP4 that plays on every phone, TV and video editor.

Drag and drop a file here

or

WEBM · up to 100 MB

Files are stored privately and deleted automatically after 60 minutes.

From browser recording to universal MP4

WEBM is what many screen recorders, browser extensions and online meeting tools save. It plays in browsers, but video editors, older phones, TVs and messaging apps often reject it.

This tool converts it to MP4 with H.264 video and AAC audio, the most widely supported combination, and enables “fast start” so the video can begin playing before it fully downloads.

  • H.264 video + AAC audio for universal playback
  • Quality: High, Balanced or Small file
  • Resolution: keep original, 1080p, 720p or 480p
  • Fast start for smooth web streaming
  • Real progress bar

How to convert WEBM to MP4

  1. 1

    Choose a WEBM file (up to 100 MB and 20 minutes).

  2. 2

    Pick a quality and, optionally, a resolution such as 720p.

  3. 3

    Click convert and watch the progress bar.

  4. 4

    Download the MP4. Files are deleted automatically within an hour.

Frequently asked questions