MOV is what iPhones and Macs record, MP4 is what everything else expects. Windows apps, upload forms, and older players regularly refuse MOV files that are perfectly good video.
This converter re-encodes the video locally using your browser's own encoder, with MP4 (H.264/AAC) as the target. Since personal videos are exactly the kind of file you shouldn't hand to a random converter site, nothing here uploads.
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This is Video Converter preconfigured for this task — open the full tool for every option.
Choose a supported file from your device.
Adjust the task-specific controls and review any browser capability warnings.
Process the file locally in this tab; no file bytes are sent to a server.
The output is reopened with a local format or playback check before download.
The generated bytes are reopened locally with the relevant media, archive, Office, font, or PDF parser. A structurally unreadable output is blocked instead of being offered under a misleading extension.
Usually the container, sometimes the codec. MOV is Apple's container format and plenty of Windows software never learned it. Repackaging into MP4 fixes the container problem, and the local re-encode handles the rest.
A little, since this is a re-encode rather than a repackage. At the default bitrate the difference is hard to spot for phone footage. Keep the original if it matters archivally.
Technical guidance for choosing settings and reviewing the result.
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