Convert MP4 to WEBM
MP4 video → WebM video: convert online for free. MP4 to WEBM conversion runs right in your browser — your files never leave your device.
Drop files here or choose them
You can also paste files with Ctrl+V
Files never leave your device
About the formats
- MP4 video
- Common video container, usually with H.264 video and AAC audio. Plays almost everywhere.
- WebM video
- Open web video container with VP8/VP9/AV1 video and Opus or Vorbis audio.
How to convert MP4 to WEBM
- Choose a MP4 video file or drag it onto the page.
- Check the settings and click Convert.
- Download the WebM video file when it is ready.
Frequently asked questions
Is converting MP4 to WEBM free?
Yes. Conversion is free, with no sign-up and no watermarks.
Are my MP4 files uploaded anywhere?
No. The conversion runs in your browser, so your files never leave your device.
Will the quality change when converting to WEBM?
Quality depends on the target format and the settings you choose; lossy formats let you adjust the quality level.