| File Extension: | QTX |
| File Type Description: | QuickTime Extension File |
| File Type Developer: | Apple |
| Primary Associated Software: | Apple QuickTime Player |
| Primary Software Developer: | Apple |
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QuickTime Extension File files were originally developed by Apple for the Apple QuickTime Player software application. Data from our web servers (annonymous users) show that QTX files are most popular in China and are often used by Windows 10. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | Apple QuickTime Player by Apple |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .VXML | Voxeo Corporation | Data Files | VoiceXML File |
| .AAE | Apple | Data Files | Sidecar Image Format File |
| .3GPP2 | Apple | Video Files | Multimedia Files For Wireless Networks |
| .H__ | Microsoft Corporation | Developer Files | C++ Header File |
| .READ | Apple | Data Files | Golden Orchard Apple II CD Rom File |
| .CWK | Apple | Data Files | ClarisWorks Document |
| .FLC | Autodesk, Inc. | Video Files | FLIC Animation |
| .QUEST | Unknown Developer | Data Files | Unknown Apple II File. (found On Golden Orchard Apple II CD Rom) |
| .PLS | Various Developers | Audio Files | Audio Playlist |
| .PER | Microsoft Corporation | Game Files | Age Of Empires Personality File |
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