What opens AVI files

AVI files are video files that most computers can play with built-in or free programs. Windows comes with Movies & TV, Mac users have QuickTime, and both systems work with VLC — a free program that handles nearly every video format. You likely already have what you need to watch an AVI file right now.

AVI stands for Audio Video Interleave, a format that's been around since the 1990s. It's less common than MP4 or MOV files today, but older videos, screen recordings, and some camera footage still use it. The file itself doesn't tell your computer which program to use, so you may need to pick one manually the first time.

Key Takeaways

  • Windows 10 and 11 include Movies & TV, which opens most AVI files without installing anything extra.
  • Mac users can try QuickTime first, but VLC (free for both Mac and Windows) works when QuickTime won't.
  • Some AVI files use older video codecs that modern players don't support — VLC handles these better than built-in programs.
  • Right-clicking an AVI file and choosing "Open with" lets you pick a different program if your default one doesn't work.

Opening AVI files on Windows

Windows 10 and 11 come with Movies & TV, which is the easiest starting point. Find your AVI file, double-click it, and it should open in Movies & TV automatically. If it does, you're done — you can play, pause, and skip through the video using the controls at the bottom of the window.

If Movies & TV doesn't open, or if the video plays but has no sound or looks corrupted, right-click the AVI file and select "Open with." A menu appears showing programs on your computer. Try Windows Media Player if it's listed. If neither of those works, you need VLC, which is free and handles older AVI formats that Windows programs often skip.

To get VLC, go to videolan.org in your web browser, click the large download button, and run the installer. Once it's installed, right-click your AVI file again, choose "Open with," and select VLC. VLC plays nearly every AVI file ever made, even ones with unusual video or audio codecs.

Opening AVI files on Mac

Mac's built-in QuickTime player handles many AVI files. Find your AVI file in Finder, right-click it, and select "Open With" followed by "QuickTime Player." If the video plays with sound and looks normal, QuickTime is your answer.

Some AVI files won't play in QuickTime — you'll see a message saying the format isn't supported, or the video will play silently. When this happens, VLC is the solution. Download it free from videolan.org, run the installer, and then right-click your AVI file and choose "Open With" followed by "VLC." VLC opens AVI files that QuickTime refuses.

When VLC is your only option

Older AVI files, especially those made before 2005, often use video codecs that Windows and Mac stopped supporting years ago. These files play perfectly in VLC because it includes codecs for formats that modern systems abandoned. If you're working with screen recordings, old home videos, or files from specialized software, VLC is usually the program that works.

VLC is also useful if you want to convert an AVI file to a more modern format like MP4. Open the AVI in VLC, go to Media menu, choose "Convert," pick MP4 as the output format, and VLC handles the rest. This takes longer than just playing the file — usually several minutes depending on the video length — but it creates a file that plays on phones, tablets, and newer computers without trouble.

Changing your default AVI player

If you open AVI files often and want one program to handle them automatically, you can set a default. On Windows, right-click an AVI file, select "Open with," choose the program you want, and check the box that says "Always use this app to open .avi files." From then on, double-clicking any AVI file opens it in that program.

On Mac, right-click an AVI file, select "Open With," choose your preferred program, and then click "Change All." This tells Mac to open all AVI files with that program going forward. You can change it back anytime by repeating the same steps and picking a different program.

Troubleshooting AVI files that won't play

If an AVI file won't play in any program, the file itself may be corrupted or incomplete. Try opening it in VLC first — if VLC can't play it either, the file is likely damaged. You can ask whoever sent you the file to resend it, or check if you have a backup copy.

If the video plays but looks distorted, has wrong colors, or plays at the wrong speed, the codec is the problem. VLC usually fixes this, but if it doesn't, the file may have been created with a codec so old or specialized that no modern player supports it. In that case, you'd need the original software that created the file, which is rarely available.

If the video plays but has no sound, try right-clicking inside the VLC window, selecting "Audio Track," and choosing a different audio option if one appears. Some AVI files have multiple audio tracks, and VLC might be playing a silent one by default.

Frequently Asked Questions

Can I play AVI files on my phone?

Most phones don't play AVI files natively. Convert the AVI to MP4 using VLC on your computer first, then transfer the MP4 to your phone. Most video apps on phones play MP4 files without any extra steps.

Why does my AVI file play in VLC but not in Windows Media Player?

Windows Media Player doesn't support all the codecs that AVI files can use. VLC includes more codecs, so it plays files that Windows Media Player refuses. This is normal and not a sign the file is broken.

Is VLC safe to download?

Yes. VLC is open-source software maintained by the VideoLAN project and is free from ads and malware. Download it only from videolan.org to avoid fake versions on other sites.

What's the difference between AVI and MP4?

AVI is an older format from the 1990s; MP4 is newer and more efficient. MP4 files are smaller, play on more devices, and are the standard for modern video. AVI files still work fine, but MP4 is better if you're creating new videos.

Can I edit an AVI file?

Yes, but most modern video editors prefer MP4 or MOV files. If you want to edit an AVI, convert it to MP4 first using VLC, then open the MP4 in your video editor. This usually works better than editing the AVI directly.