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MP4 to WEBM Converter

Convert MP4 files to WEBM format online, free — no sign-up, no watermark, no software to install. Upload your MP4, hit convert, download your WEBM.

100% freeNo sign-upNo watermarkFiles auto-deletedWorks on any device

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Tap to choose a file or drag & drop it here

MP4 files · deleted right after processing

Output format

A short ad is shown before processing — it keeps this tool free. No sign-up, no watermark.

How to convert MP4 to WEBM

No account, ever. Most big converter sites push sign-ups and paid tiers for basic jobs. Here the tool just works.
No watermarks, no daily caps on standard tools, and a generous 200 MB upload limit.
Private by design: your file is processed in a temporary folder and deleted the moment your download finishes. Nothing is stored or shared.
Fast: this page is a fraction of the size of the ad-heavy alternatives, and the same account-free toolbox has 30+ other tools when you need them.

Will the quality change converting MP4 to WEBM?

We use high-quality encoder settings tuned to stay visually/sonically faithful to the original while keeping files shareable.

Is this really free?

Yes — completely. A short ad before processing keeps every tool free; no account, subscription or credits are ever required.

What happens to my file?

It is processed in a temporary folder and deleted the moment your download finishes. We never store, view or share uploads.

Do I need to install anything?

No. Everything runs in your browser session against our servers — any phone, tablet or computer works.