QT File Extension

What is QT file?

QT filename suffix is mostly used for Apple QuickTime Movie files. Apple defined the Apple QuickTime Movie format standard. QT files are supported by software applications available for devices running Mac OS, Windows. QT file belongs to the Video Files category just like 546 other filename extensions listed in our database. Users are advised to use QuickTime Player software for managing QT files, although 13 other programs can also handle this type of file. On the official website of Apple, Inc. developer not only will you find detailed information about theQuickTime Player software, but also about QT and other supported file formats.

Programs which support QT file extension

The list that follows enumerates programs compatible with QT files, divided into 2 categories based on operating system on which they are available. Files with QT suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

How to open file with QT extension?

Being unable to open files with QT extension can be have various origins. On the bright side, the most encountered issues pertaining to Apple QuickTime Movie files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the QuickTime Player

The most common reason for such problems is the lack of proper applications that supports QT files installed on the system. This issue can be addressed by downloading and installing QuickTime Player or different compatible program, such as PowerDVD, Adobe Flash Professional, jetAudio. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. If you want to download QuickTime Player installer in the most secured manner, we suggest you visit Apple, Inc. website and download from their official repositories.

Step 2. Update QuickTime Player to the latest version

If the problems with opening QT files still occur even after installing QuickTime Player, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of QuickTime Player is available. Software developers may implement support for more modern file formats in updated versions of their products. The reason that QuickTime Player cannot handle files with QT may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using QuickTime Player.

Step 3. Set the default application to open QT files to QuickTime Player

After installing QuickTime Player (the most recent version) make sure that it is set as the default application to open QT files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Right-click the QT file and choose Open with option
• Select Choose another app → More apps
• To finalize the process, select Look for another app on this PC entry and using the file explorer select the QuickTime Player installation folder. Confirm by checking Always use this app to open QT files box and clicking OK button.

Change the default application in Mac OS

• Right-click the QT file and select Information
• Proceed to the Open with section. If its closed, click the title to access available options
• From the list choose the appropriate program and confirm by clicking Change for all....
• Finally, a This change will be applied to all files with QT extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the QT for errors

Should the problem still occur after following steps 1-3, check if the QT file is valid. Being unable to access the file can be related to various issues.

1. Verify that the QT in question is not infected with a computer virus

If the QT is indeed infected, it is possible that the malware is blocking it from opening. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the QT file is indeed infected follow the instructions below.

2. Verify that the QT file’s structure is intact

Did you receive the QT file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the QT file has been downloaded from the internet only partially, try to redownload it.

3. Verify whether your account has administrative rights

Sometimes in order to access files user need to have administrative privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle QuickTime Player

The operating systems may note enough free resources to run the application that support QT files. Close all running programs and try opening the QT file.

5. Ensure that you have the latest drivers and system updates and patches installed

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Apple QuickTime Movie file. It is possible that one of the available system or driver updates may solve the problems with QT files affecting older versions of given software.

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