Slower, but the result plays on practically every device.
Updated July 2026
About this tool
MOV is Apple's QuickTime container — the default output of iPhones, iPads and macOS screen recordings. A container is just a wrapper around the actual video and audio streams, and most MOV files already hold H.264 or HEVC video with AAC audio: exactly the codecs MP4 carries. The playback trouble starts when that wrapper reaches Windows, Android or a web player that never learned to open QuickTime files.
That's why this converter is remux-first: if the MOV already contains MP4-compatible streams, it is remuxed — repackaged into an MP4 container without re-encoding — so the conversion is lossless and near-instant; otherwise it is transcoded to H.264/AAC. Incompatible codecs like ProRes are re-encoded where your browser can decode them (typically Safari). Either way the result is an MP4 that plays on Windows, Android, the web, video editors and social apps alike.
Conversion runs in a Web Worker in your browser — videos are never uploaded.
Frequently asked questions
Does converting MOV to MP4 lose quality?
Usually not. MOV and MP4 are containers, and most MOV files (including iPhone recordings) already contain H.264 or HEVC video, so this tool just remuxes — it moves the streams into an MP4 container without re-encoding. That is lossless and near-instant. Only incompatible codecs (e.g. ProRes, where your browser can decode it — typically Safari) are re-encoded to H.264, with a small, usually invisible quality trade-off.
Are my videos uploaded to a server?
No. Conversion runs entirely in your browser using its built-in codecs (WebCodecs); the video never leaves your device. That makes it safe for private footage and usually faster than upload-based converters, since there is nothing to upload or download.
What is the difference between MOV and MP4?
Both are containers: MOV is Apple's QuickTime format, MP4 is the ISO standard derived from it. They can hold the same video data, but MP4 is supported virtually everywhere — Windows, Android, web players, editors and social apps — while MOV support outside Apple software is patchy.
Will iPhone videos (HEVC) play everywhere after conversion?
When remuxed, HEVC stays HEVC, which most modern devices play fine. If you need maximum compatibility — older Windows PCs, some web players — use the re-encode to H.264 option: an H.264 MP4 plays on practically every device.