Convert MOV to WebM

How it works

1. 1

   Add your MOV file

   Drop, pick, or paste it. It stays on your device.

2. 2

   Convert

   We re-encode it to WEBM right here in your browser.

3. 3

   Download

   Save the WEBM file.

Apple footage, prepared for a web page

A MOV comes out of Apple hardware carrying H.264 or HEVC. WebM carries VP9 or AV1. Those have nothing in common, so unlike most of the conversions here, this one cannot be a rewrap: the video has to be fully decoded and encoded again, and that takes real time.

It is usually worth the wait, because of what you get. VP9 reaches the same visual quality as H.264 in a smaller file, so a clip you are serving from your own site costs less bandwidth and loads faster for the people watching it. On a page with video above the fold, that is a difference visitors actually feel.

This is a conversion for video you are publishing, not video you are sending. If the clip is going to a person rather than a web page, convert your MOV to MP4 instead and save yourself both the wait and the compatibility problems.

Why nothing uploads

Other tools send your video to their servers, which costs them money per file, so they add watermarks, cap file sizes, and make you sign up. This tool does the work right here in your browser using your own device. Your file is never uploaded, so there is no wait, no watermark, no size limit, and no account.

Questions

Why is this slower than MOV to MP4?

Because MOV to MP4 is usually a rewrap, where nothing is decoded. WebM uses entirely different codecs, so every frame has to be re-encoded.

Will it look worse?

Not noticeably. VP9 is an efficient codec, and at sensible settings the re-encode is very hard to distinguish from the source.

Should I use WebM or MP4 on my site?

WebM is smaller and every current browser plays it. Serving an MP4 alongside it is still a reasonable hedge for older devices.

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