Convert MOV to MP4 online in your browser

MOV is a QuickTime container commonly produced by Apple devices and video software. Many applications can open it, but a recipient’s player or editing workflow may work more smoothly with MP4. A converted copy can be convenient for sharing, uploading to a service or importing into software that expects MP4. The container name alone does not identify every codec inside the file, so playback support can depend on the video and audio streams as well.

Conversion usually decodes and re-encodes those streams. This can make the file compatible with a different playback environment, but it can also change the image or audio quality. Keep the original MOV, especially for important recordings or future edits. Converting an already compressed clip more than once can compound losses, so create the MP4 from the best-quality source available.

Some iPhone and camera recordings use HEVC, also known as H.265, which can reduce file size while retaining detail. Older Windows computers, browsers or editors may not include a compatible HEVC decoder. If the source cannot be opened, the browser may not be able to convert it. Try a current browser and operating system with HEVC support or another trusted local media tool.

When the file opens, the browser processes it locally with its available media codecs. The video is not uploaded by this converter. Large 4K recordings can take time and require significant memory, so keep the tab open and allow the job to finish. If the result is for email or messaging, reducing the resolution can make it easier to send, though fine details will be less clear.

For general sharing, MP4 encoded with H.264 video and AAC audio is broadly supported. Browser codec support varies, so the actual result depends on your device. Choose the highest resolution you need rather than automatically keeping a 4K source for a small phone screen. Lowering resolution and quality can reduce file size, while high-motion scenes may need more data to avoid blockiness.

After conversion, play the file and check the start, middle and end, including audio synchronisation. A size reduction is not guaranteed if the source was already compressed efficiently. If the new file is larger than the MOV, try a lower quality setting. For a broader choice of formats and settings, open the video converter. Keep an untouched original until the MP4 has been checked and safely copied.