How to Convert a MOV File to MP4 on Windows or Mac

The fastest way to convert MOV to MP4

You can convert a MOV file to MP4 using free software on your computer — you do not need to upload your video to a website or pay for a service. On Windows, the easiest option is HandBrake, which is free and handles both formats without extra steps. On Mac, you can use HandBrake as well, or use the built-in QuickTime Player if you only need a basic conversion.

The conversion takes anywhere from a few minutes to an hour depending on your video length and your computer's speed. The file size usually stays about the same, though MP4 files are often slightly smaller. Once the conversion finishes, you will have both the original MOV file and the new MP4 file on your computer.

Key Takeaways

HandBrake is free software that works on both Windows and Mac and converts MOV to MP4 without uploading your video anywhere.
On Mac, QuickTime Player can export MOV files as MP4 directly, though HandBrake gives you more control over quality and file size.
The conversion process takes a few minutes to an hour depending on video length, and your original MOV file stays on your computer.
MP4 files play on more devices and websites than MOV files, which is why conversion is often necessary.

Converting MOV to MP4 on Windows using HandBrake

HandBrake is a free program that converts video files between formats. Download it from handbrake.fr and install it like any other Windows program. Once it opens, click the folder icon in the top left and find your MOV file on your computer. HandBrake will load the video and show you a preview.

On the right side of the screen, you will see a dropdown menu that says "Format". Click it and select "MP4 file". Leave all the other settings at their defaults unless you have a specific reason to change them — the default settings produce good quality MP4 files. Then click the "Start" button at the top. HandBrake will convert your file and save the MP4 version in the same folder as your original MOV file.

The window will show a progress bar while the conversion happens. Do not close HandBrake or put your computer to sleep while it is working. Once the progress bar reaches 100%, your MP4 file is ready to use.

Converting MOV to MP4 on Mac using QuickTime Player

If you have a Mac, the simplest method is to use QuickTime Player, which is already installed on your computer. Open QuickTime Player, go to File > Open File, and select your MOV file. The video will play in QuickTime.

Once the video is open, go to File > Export As. A dialog box will appear. At the bottom, there is a dropdown menu that currently says "Video". Click it and select "MP4". Choose where you want to save the file and click Save. QuickTime will convert the file, which usually takes a few minutes depending on video length.

If you want more control over the conversion — for example, to make the file smaller or change the quality — use HandBrake instead. Download it from handbrake.fr, install it, and follow the same steps as the Windows instructions above. The Mac version works identically.

Why you might need to convert MOV to MP4

MOV is a video format created by Apple and works well on iPhones, iPads, and Macs. However, many websites, social media platforms, and Android devices do not accept MOV files. MP4 is a more universal format that plays on almost every device and website, which is why conversion is often necessary.

If you are uploading a video to YouTube, Facebook, Instagram, or TikTok, those platforms accept MP4 but may have trouble with MOV. If you are sending a video to someone with an Android phone or a Windows computer, MP4 is the safer choice. Some older video players and devices only recognize MP4 as well.

What to do if the conversion fails or takes too long

If HandBrake shows an error message, the most common cause is a corrupted MOV file. Try opening the MOV file in QuickTime Player or another video player first to confirm it plays without freezing or skipping. If the video plays fine but HandBrake still fails, restart your computer and try again.

If the conversion is taking much longer than expected, check your computer's performance. Close other programs, especially web browsers with many tabs open, because they use memory and slow down the conversion. On Windows, you can check how much of your computer's resources HandBrake is using by opening Task Manager (press Ctrl + Shift + Esc) and looking at the CPU and Memory columns. If your computer is very slow overall, the conversion will take longer.

If you have a very large MOV file (over 2 GB), the conversion may take an hour or more. This is normal. Let HandBrake run overnight if needed — just make sure your computer does not go to sleep. On Windows, go to Settings > System > Power & Sleep and set the sleep timer to "Never" while you are converting. On Mac, go to System Preferences > Energy Saver and uncheck "Put hard disks to sleep when possible".

Checking your converted MP4 file

Once the conversion finishes, open the folder where you saved the MP4 file and double-click it to play it. The file should open in your default video player. If it plays smoothly without freezing or skipping, the conversion was successful.

Compare the file size of the MP4 to your original MOV file. Right-click the file (or Ctrl-click on Mac) and select Properties or Get Info to see the file size. MP4 files are usually 10 to 20 percent smaller than the original MOV, though this varies depending on the video content. If your MP4 file is much larger than the MOV, something went wrong — delete it and try the conversion again.

Frequently Asked Questions

Will converting MOV to MP4 reduce the video quality?

No, not noticeably. Both HandBrake and QuickTime use settings that preserve the original quality by default. The video will look the same to your eye. The file may be slightly smaller because MP4 uses more efficient compression, but you will not see a difference in picture quality.

Can I convert multiple MOV files at once?

HandBrake has a "Batch Scan" feature that lets you convert multiple files in a row. Click the folder icon, select a folder that contains multiple MOV files, and HandBrake will add them all to the queue. Click Start and it will convert them one after another. QuickTime Player only converts one file at a time, so you would need to repeat the export steps for each file.

What if my MOV file is from an iPhone or GoPro?

HandBrake and QuickTime both handle iPhone and GoPro MOV files without any special steps. Follow the same conversion process as you would for any other MOV file. The conversion will work the same way.

Do I need to delete the original MOV file after converting?

No. Your original MOV file stays on your computer and is not affected by the conversion. You can delete it if you want to save space, but you do not have to. Many people keep both versions in case they need the original later.

Can I convert MP4 back to MOV if I change my mind?

Yes. Use the same process in reverse — open HandBrake or QuickTime, select your MP4 file, and export it as MOV. The quality will be the same because you are not losing information in either direction.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.