Open-The-File.com

Find how to open any file type

.QT file extension

To open .QT files on Windows, right-click the .QT file and select 'Open with'.

.QT files are video files that can be opened with media players supporting QuickTime, such as VLC or QuickTime Player. To open a .QT file, use a compatible media application.

HomeExtension IndexVideo in indexVideo category page

Last updated: March 19, 2026 · Reviewed by Julian Stricker

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .QT files

Use these platform-specific instructions to open .QT files safely.

Windows

  1. Right-click the .QT file and select 'Open with'.
  2. Choose VLC Media Player or QuickTime Player if installed.
Full Windows guide

Mac

  1. Control-click the .QT file and select 'Open With'.
  2. Choose QuickTime Player or VLC Media Player.
Full Mac guide

Linux

  1. Right-click the .QT file and select 'Open With'.
  2. Choose VLC Media Player or another compatible application.
Full Linux guide

iOS

  1. Tap the .QT file in the Files app.
  2. Select a compatible app like VLC for Mobile if Quick Look is unavailable.
Full iOS guide

Android

  1. Open the .QT file using a file manager.
  2. Select VLC for Android or another compatible media player.
Full Android guide

Security notes

  • Open .QT files only from trusted sources to avoid malware.
  • Use antivirus software to scan files before opening.
  • Avoid downloading .QT files from unverified websites.

Recommended antivirus software

Scan files before opening them. These antivirus tools help protect against malware and viruses.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

Norton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

Can't open this file?

These are the most common causes and fixes when .QT files fail to open.

Common reasons

  • QT file does not open
  • No video playback

Fix steps

  1. Install VLC Media Player or QuickTime Player.
  2. Ensure the file is complete and not corrupted by re-downloading it.

OS-specific troubleshooting

Convert .QT to other formats

Use conversion tools to change .QT files into formats your software supports.

What is a .QT file?

.QT is a file extension for a video file format developed by Apple for the QuickTime framework. It is used to store video, audio, and text data and is compatible with various media players that support QuickTime.

Background

.QT files are part of the QuickTime multimedia framework developed by Apple, designed to handle various formats of digital video, picture, sound, panoramic images, and interactivity. QuickTime was first introduced in 1991, and its file format has been widely adopted for its versatility and efficiency in handling high-quality video and audio content. These files are typically used in professional video editing and production environments, as well as for streaming media on the internet. While QuickTime is primarily associated with Apple devices, the .QT format is supported by various cross-platform media players, making it accessible on Windows and Linux systems as well. Users should note that, while powerful, the QuickTime framework has seen reduced support on non-Apple platforms, leading users to seek alternative media players like VLC that can handle .QT files.

Common MIME types: video/quicktime

Further reading

Authoritative resources for more details on the .QT format.

Common .QT issues

QT file does not open

This issue may arise if the necessary application is not installed or the file is corrupted.

  1. Install VLC Media Player or QuickTime Player.
  2. Ensure the file is complete and not corrupted by re-downloading it.

No video playback

The video plays without visual content, possibly due to missing codecs.

  1. Install a codec pack like K-Lite Codec Pack.
  2. Try using VLC Media Player, which includes built-in codecs.

FAQ

Can I convert a .QT file by renaming it?

No, renaming does not change the file format. Use conversion software.

Is the .QT format obsolete?

While less common, .QT is still used in professional environments and supported by several media players.

Similar file extensions

Compare related formats in the same category to find the right tool faster.