Convert MOV to MP4

Convert iPhone and QuickTime MOV videos to MP4 right in your browser. Free and private — no upload, no size limit and no watermark.

Drop your file here (.mov)

🔒 Private by design: your files are processed locally in your browser and never uploaded to any server.

How to convert MOV to MP4

  1. Drop your MOV file into the box above, or click to choose it — an iPhone recording, a QuickTime screen capture, anything with a .mov extension.
  2. Pick a quality level. Balanced is right for most videos; choose High quality if you plan to edit the result.
  3. Click Convert MOV to MP4, wait for the progress bar to finish, and download your MP4.

Why convert MOV to MP4?

MOV is Apple’s QuickTime container. Every video an iPhone or iPad records comes out as a MOV file, and on Apple devices that is fine — they play natively in Photos, QuickTime and iMovie. The trouble starts the moment the file leaves the Apple ecosystem.

Since the iPhone 7, iPhones default to recording in HEVC (H.265), a codec that many Windows PCs cannot play without a paid extension, that older Android phones do not decode, and that plenty of smart TVs, projectors and car screens simply ignore. Even when the codec is fine, some software — older editing tools, PowerPoint on Windows, certain web upload forms — rejects the MOV container itself.

MP4 with H.264 video is the opposite: it is the closest thing to a universal video format. It plays on every phone, tablet, browser, TV and games console made in the last decade, and it is what social platforms, learning systems and email recipients handle without complaint.

This converter re-encodes your MOV into exactly that: H.264 video with AAC audio in an MP4 container, with fast-start enabled so the file can begin playing before it has fully downloaded.

Your videos never leave your device

Most online converters upload your file to their servers — which is why they cap free conversions at 50 or 100 MB, and why handing over personal footage should give you pause. The videos on your phone are some of the most personal files you own: your kids, your home, your holidays.

SysFenix works differently. It runs FFmpeg — the same engine professionals use — compiled to WebAssembly inside your browser tab. Nothing is uploaded, so there is no size cap, no waiting in a queue, and no server that ever sees your video. Close the tab and no trace remains anywhere but your own device.

The trade-off is that conversion speed depends on your hardware: a modern laptop is quick, an older phone takes longer, and long 4K recordings are heavy work anywhere. The progress bar keeps you posted, and you can leave the tab working in the background.

Common uses

Frequently asked questions

Is my video uploaded to a server?

No. The conversion runs entirely in your browser using a WebAssembly build of FFmpeg. Your video never leaves your device, so a private family clip stays exactly as private as it was on your phone.

Is there a file size limit?

There is no artificial limit. Because your own device does the work, you can convert a multi-gigabyte iPhone recording for free — something most online converters reserve for paid plans. Very large files are limited only by your device's memory.

Why won't my iPhone MOV video play on Windows or Android?

Recent iPhones record in HEVC (H.265) inside a QuickTime MOV container, and many Windows PCs, Android phones and smart TVs lack the codec or the container support. Converting to MP4 with H.264 video solves both problems at once.

Will converting reduce the quality of my video?

Re-encoding always involves some loss, but the default "Balanced" setting is visually indistinguishable from the original for most footage. Pick "High quality" if you plan to edit the file later or want the smallest possible difference.

What settings does the output MP4 use?

The output uses H.264 video and AAC audio — the most widely compatible combination there is. It plays on phones, TVs, browsers, game consoles and editing software, and fast-start is enabled so it can begin playing while it downloads.

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