Why choose WEBM over MP4 for the web?

WEBM is royalty-free and compresses smaller than H.264 MP4 at matching quality — a good default for self-hosted background loops and product demos.

Does WEBM play on iPhone Safari?

Safari added WEBM support in iOS 16. For broader coverage, host both MP4 and WEBM inside a element with two children.

How large a video can I convert?

Only your device's RAM caps you — multi-gigabyte 4K files work on typical laptops. Nothing is uploaded, so there's no server limit.

MP4 to WEBM: Convert Video in Your Browser

Why WEBM

WEBM was built by Google specifically for the web. It ships with the VP8/VP9 video codec and Vorbis/Opus audio — all royalty-free. At matching quality, VP9 is typically 20–35% smaller than H.264 MP4, which shaves seconds off first-frame time on hero videos and background loops.

Step-by-step

Open the MP4 → WEBM tool.
Drag your MP4 into the drop zone.
The target format is pre-set to WEBM.
Click Convert. The progress bar shows real ffmpeg progress.
Download when done — the WEBM saves to your device.

Compatibility notes

Chrome, Firefox, Edge, and Opera play WEBM natively. Safari added support in macOS Big Sur and iOS 16. For maximum coverage on older devices, keep the MP4 as a fallback:

<video controls>
  <source src="clip.webm" type="video/webm" />
  <source src="clip.mp4" type="video/mp4" />
</video>