Built for embedding
Every modern browser plays WebM natively, with no plugins and no codec licensing attached — which is why it is the format of choice for video backgrounds, product demos and anywhere you serve video from your own site. Its codecs also compress better than H.264, so the same visual quality usually arrives in a noticeably smaller file: faster pages, cheaper bandwidth.
Encoding takes its time
Fair warning: WebM buys its efficiency with heavy computation, so this is a genuine re-encode and runs slower than a container swap — minutes, not seconds, for longer clips. The trade is deliberate: you encode once, and every visitor downloads less. All of it happens in your browser; the video is never uploaded anywhere.
Frequently asked questions
Why WebM instead of MP4 on a website?
Open and royalty-free, natively supported in every modern browser, and usually smaller at equal quality — the practical choice for self-hosted web video.
How much smaller will it be?
Typically 20–40% below the H.264 original at comparable quality, depending on content. Screen recordings and animation compress especially well.
Why is the conversion slow?
WebM's codecs are computationally heavy by design — that's where the compression gains come from. Long videos take minutes; worth it for a file served thousands of times.