Convert MP4 to WebM for free
Convert MP4 to WebM in your browser with Vaults. This 100% free converter uses VP8 video and keeps your file on your device.
Short answer
Convert MP4 to WebM in your browser with Vaults. This 100% free converter uses VP8 video and keeps your file on your device.
Convert your MP4
Open Tools, select Video studio, choose an MP4 and select WebM (VP8) under Output format. Set compression and maximum height, then press Export video. Download saves the WebM directly to your device.
Check compatibility
WebM can be useful for web backgrounds, but it is not always smaller than MP4. Preview your export and check playback wherever you plan to use it. If audio is retained, WebM uses Vorbis.
Free and local, with practical limits
All these tools are 100% free. Video exports run in your browser and do not upload your file. The first video export loads about 31 MB of the converter onto your device, so the page itself still uses some bandwidth. Exporting takes time and memory, especially on phones. Use files up to 100 MB and clips up to 120 seconds; ping-pong selections are limited to 20 seconds. There is no automatic upload or profile change.
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