MOV to MP4 Converter Online — Convert Locally
Convert MOV to H.264 MP4 online in your browser without uploading the video.
Loading local video processor…
About this tool
This local MOV converter decodes the QuickTime container and creates a broadly compatible MP4 with H.264 video and AAC audio when an audio track exists.
How to use
- Choose a supported video smaller than 200 MB.
- Select the output option, then start local processing.
- Preview and download the new video before closing the page.
Features
- MOV input with MP4 output.
- H.264 video and optional AAC audio.
- No server upload or account.
Common use cases
- Prepare an iPhone or camera MOV for sharing.
- Create a video for browsers and office software.
- Replace a less compatible QuickTime container.
Common issues and tips
- Conversion re-encodes video and can take longer than the source duration on slower devices.
- Unsupported source codecs or very large files can exceed browser memory.
Privacy
The video is processed locally in your browser with FFmpeg WebAssembly and is not uploaded to Tools12345.
Frequently asked questions
Does this only rename the extension?
No, it decodes and re-encodes the video.
Is audio retained?
An available audio track is converted to AAC.
Why is the first run slower?
The browser first downloads and caches the local processing core.