Free · No signup · Files deleted after 1h

MP4 to WEBM
Converter

Convert MP4 to WEBM — smaller files, open-source codec, optimised for web embedding. Free, no signup, no watermarks.

Convert MP4 to WEBM free →

No account needed · Up to 25 MB free · Files permanently deleted after 1 hour

Smaller for the web
WEBM with VP9 codec typically produces files 20–40% smaller than MP4/H.264 at the same quality. Faster page loads, lower bandwidth bills.
Open-source codec
WEBM uses royalty-free VP9 / AV1 codecs — no licence fees if you're embedding video in a product or paid service.
Private & secure
Files are uploaded over HTTPS, processed in the EU, never shared, and permanently deleted within 1 hour.

How it works

1
Upload your MP4
Drag and drop, or click to browse. H.264 and H.265 input streams are both supported.
2
WEBM selected by default
WEBM is pre-selected. You can also export to MOV or AVI from the format picker.
3
Download instantly
Your WEBM is ready in seconds. The link is valid for 15 minutes after the conversion completes.

Common questions

Why convert MP4 to WEBM?

WEBM is the format of choice when you're embedding video on a website — smaller files than MP4, royalty-free codec (no licence headaches if you sell a product that plays video), and all modern browsers support it natively. Common use cases: hero-section background videos, product demo loops, in-app tutorial videos.

Will quality drop?

Re-encoding from MP4 to WEBM is always a lossy process, but at our default high-quality settings the visual difference is imperceptible for most viewers. If preserving every pixel matters, use the API with a higher-quality flag.

Is there a file size limit?

Free users can convert MP4 files up to 25 MB without an account, or up to 10 conversions per day with a free account. Pro users get 500 MB per file and 3,000 credits a month. Business users get up to 5 GB.

Related converters
WEBM → MP4 MP4 → MOV MP4 → GIF MP4 → MP3 Compress video