MOV to WebM
Turn a QuickTime MOV into a smaller web-ready WebM.
Uses your browser codecs
Local video benchNo file loaded
OutputWebCodecs
How it works
- Choose a MOV video.
- Keep WebM as the output.
- Convert and download the WebM.
MOV to WebM, briefly
MOV is Apple's QuickTime container — what iPhones, Macs, and many cameras record. It is high quality but large, and outside the Apple ecosystem it is not always the easiest to place. WebM is the web's open format: smaller at comparable quality and ideal for video you host and embed yourself in a modern browser.
Convert to WebM when the clip is destined for a web page you control. If you instead need a file that plays and uploads almost anywhere, target MP4 with the MOV to MP4 tool. The MP4 vs WebM guide lays out the trade-off.
Questions
- Why convert MOV to WebM?
- To get a smaller, web-ready file for a page you host yourself. WebM with VP9 or AV1 reaches similar quality at a smaller size than a large MOV, which speeds up page loads.
- Should I use WebM or MP4?
- Use WebM for self-hosted web video in modern browsers. Use MP4 if you need to share, upload, or edit the file, since WebM is rejected by some editors, phones, and apps.
- Does the conversion lose quality?
- A little — re-encoding into a new codec is lossy, so some detail is dropped. Converting once is usually fine; repeatedly re-encoding the same clip is what visibly degrades it.
- Why might a MOV fail to convert?
- Conversion uses your browser's codec support. An unusual track or a codec the browser cannot handle can stop it, and what works differs between browsers. Trying MP4 instead sometimes succeeds.
- Is the MOV uploaded anywhere?
- No. Everything runs in your browser tab, so the file never leaves your device and no account is needed.