Turn WebM files into MOV
Turn your WebM into an MOV. WebM is a free video format built for web pages, so browsers play it with no plugin and no licence behind it. Worth knowing: an MOV will not open in a browser tab, so it is a file for software rather than for the web. Your file never leaves your computer.
Need the other direction? Convert MOV to WebM
How to convert WebM to MOV
- 1 Drop your WebM .webm file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the MOV, or add more files and do the whole set in one go.
Why convert WebM to MOV
- Carries the high quality footage professional editing tools expect.
- Supports timecode, several tracks and transparency for editing.
- Footage handed between Final Cut and other Apple tooling.
- WebM: slower to produce than an MP4 of the same clip.
WebM compared with MOV
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | WebM | MOV |
|---|---|---|
| File extension | .webm | .mov |
| Compression | Lossy | Lossy or lossless |
| Typical file size | Smaller | Depends on mode |
| Browser support | All current browsers | Some browsers |
| Introduced | 2010 | 1991 |
| Developed by | Apple | |
| Standard | Open | Proprietary |
Quality and what changes
MOV stores the same content under a different set of rules, so what matters here is compatibility rather than picture quality. Convert once from the best source you have rather than through a chain of intermediate files.
- Browsers will not display an MOV, so it downloads rather than opening in a tab.
- One MOV limitation to keep in mind: windows and Android often need extra software, or a conversion.
Questions about WebM to MOV
Is my WebM file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your WebM is read straight from your own disk, converted on your machine and handed back as an MOV. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several WebM files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate MOV downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.