Convert MP4 to WebM online (smaller web video) - OpenClip
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Convert MP4 to WebM online (smaller web video)

Convert MP4 into WebM for lighter, open-format web video, from your browser. Your video never leaves your device.

1

Upload your MP4

Drop any .mp4 file. Processing happens in your browser.

2

Convert to WebM

The video is re-encoded to the WebM format automatically.

3

Download the WebM

Save a lighter WebM for fast-loading web video.

Step 1

Upload your file

MP4, MOV, WEBM, MKV, and more. Files never leave your device.

Questions & answers

Often yes at the same visual quality, which is why WebM is popular for background and inline web video. The exact saving depends on the source.

No. The conversion runs locally in your browser, your video never leaves your device, and we keep nothing.

Modern Chrome, Firefox, and Edge do. For Safari and broad device support, keep an MP4 copy as a fallback.

The format converter also converts WebM back to MP4.

Stop editing one clip at a time.

OpenClip finds your best moments, reframes them face-aware for every platform, writes the captions, and posts them. One upload, a week of content.

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