You copied a video off your iPhone onto a Windows laptop, a smart TV or an upload form, and it either won't open, plays without picture, or gets rejected. The file ends in .MOV, and that's the clue.

MOV vs MP4: what's the difference?

Both MOV and MP4 are containers, like boxes that hold the video and audio inside. MOV is Apple's format; MP4 is the international standard based on it. They're close cousins, which is good news: in many cases converting from MOV to MP4 just means moving the same video into a different box.

What actually decides whether a file plays is the codec, the way the video inside is compressed:

  • H.264 plays almost everywhere: every browser, phone, TV and editing app made in the last decade.
  • HEVC (H.265) is newer and makes files about half the size at the same quality. It's what iPhones record by default. Many older Windows PCs, TVs and websites can't play it without extra software.

So an iPhone MOV file often has two problems at once: an Apple container and an HEVC video inside.

The fast way: convert in your browser

  1. Open the MOV to MP4 converter.
  2. Drop your MOV file (MKV, WEBM, AVI and FLV work too).
  3. Press Convert and wait for the progress bar.
  4. Download your MP4.

The converter checks what's inside your file first:

  • If the video is already H.264, it simply repackages it as MP4. That takes a few seconds and is completely lossless: every frame stays exactly the same.
  • If it's HEVC or another codec, it re-encodes the video to H.264 with high-quality settings, so the result plays everywhere.

Files are deleted from our server automatically within 30 minutes.

Stop your iPhone from recording HEVC in the first place

If you regularly move videos to Windows or upload them to older platforms, you can tell your iPhone to record in the more compatible format:

  1. Open Settings and tap Camera.
  2. Tap Formats.
  3. Choose Most Compatible.

From then on, new videos are recorded as H.264. The trade-off is larger files, roughly twice the size of HEVC for the same quality, so keep an eye on your storage.

Transfer settings that help

When you send videos from an iPhone with AirDrop, iCloud or a cable, iOS can sometimes convert them for you. Under Settings → Photos, the Transfer to Mac or PC option set to Automatic converts photos and videos to compatible formats when you copy them over a cable. It doesn't help with every transfer method, but it's worth turning on.

Does converting reduce quality?

  • Repackaging (H.264 in a MOV): no quality loss at all.
  • Re-encoding (HEVC to H.264): technically yes, but with high-quality settings the difference is invisible to almost everyone. The file usually gets bigger, because H.264 needs more data than HEVC for the same picture.

If the converted file is too big to share, run it through the video compressor afterwards, or use the Discord and email presets that target a specific size.

Quick troubleshooting

The converted video has no sound. Some screen recordings and camera clips have no audio track to begin with. Check the original in QuickTime or VLC.

Conversion is slow. Re-encoding a long 4K HEVC video takes real processing time. Shorter clips or 1080p recordings finish much faster.

The file is over 200 MB. That's the current upload limit. Trim the video on your phone first (open it in Photos, tap Edit and drag the ends), then convert the shorter clip.

Converting is usually a ten-second job. Drop your file into the MOV to MP4 converter and it will play anywhere.