Convert MOV to MP4 locally in your browser
The selected file is read into browser memory and processed by FFmpeg.wasm without a media upload endpoint.
Private local file conversion
Free Online MOV to MP4 Converter Without Uploads
Convert a QuickTime MOV file to a compatible MP4 on this device with fast remuxing or H.264/AAC re-encoding.
No upload No signup No watermark
Open the tool Choose a local media file. It will not be uploaded.
Choose original or compatible MP4 output
Use fast remuxing when streams are compatible, or re-encode for a predictable playback profile.
Download MP4 files with no watermark
The finished file is created on this device with no account, watermark, or daily quota from this site.
How to convert QuickTime MOV to MP4 online without software
Select your MOV file, keep MP4 as the output, and start. iPhone and QuickTime recordings usually already contain H.264 or HEVC video, so Original quality (remux) rewraps the tracks into MP4 in seconds without recompressing them.
If the MOV uses HEVC and your target player cannot decode it, choose Balanced mode to re-encode to H.264/AAC. The result plays on Windows, Android, smart TVs, and inside every common browser and editor.
Why convert iPhone and QuickTime MOV files to MP4
MOV is Apple's native container. It plays everywhere on macOS and iOS, but some Windows players, older Android devices, web uploads, and editing tools accept only MP4. Converting MOV to MP4 makes the same media portable without changing the underlying video.
Because conversion happens locally with FFmpeg.wasm, private phone videos never leave your device. There is no size-based pricing, no queue, and no watermark — just a browser tab.
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Common questions
MOV to MP4 Converter frequently asked questions
Straight answers about browser support, privacy, source access, and output behavior.
Are local video files uploaded during conversion?
No. The file is read into browser memory and passed to FFmpeg.wasm locally. There is no upload step or cloud storage.
Why is browser video conversion slower than desktop FFmpeg?
WebAssembly runs inside the browser sandbox and commonly uses fewer CPU resources than a native FFmpeg build. The first conversion also loads a 31 MB media engine that is reused for the rest of the session.
Which local media formats can I convert online?
Common MP4, MOV, MKV, WebM, AVI, MP3, AAC, and WAV inputs are supported when the bundled FFmpeg build contains the required decoder. Outputs include MP4, WebM, MKV, MP3, and GIF.
Will remuxing a video reduce quality?
No. Original-stream remux mode copies compatible encoded tracks without recompressing them. It is much faster, but a copied codec may still be unsupported by the target device.
How do I convert MKV to MP4 without losing quality?
Use Original quality mode. When the MKV contains H.264 video and AAC audio, remuxing copies those tracks into an MP4 container in seconds without any recompression. Re-encode only when the source codecs are not supported by your target device.