| File Extension: | HHK |
| File Type Description: | HTML Help Index |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft HTML Help Workshop |
| Primary Software Developer: | Microsoft Corporation |
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The HHK file extension is a HTML Help Index file developed originally by Microsoft Corporation for Microsoft HTML Help Workshop. Data from our web servers (annonymous users) show that HHK files are most popular in United States and are often used by Windows 10. In most cases, these users are surfing the internet using the Google Chrome browser.
 | Microsoft HTML Help Workshop by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .PS2 | Datel | Game Files | Sharkport Saved Game File |
| .VIS | Microsoft Corporation | Game Files | Visibility Image File |
| .GR2 | Larian Studios | Game Files | Divinity: Original Sin Game Data |
| .WVX | Microsoft Corporation | Video Files | Windows Media Video Redirector |
| .VSPX | Microsoft Corporation | Developer Files | Visual Studio Performance Report File |
| .MRK | Microsoft Corporation | Uncommon Files | DPOF Auto Print Order File |
| .OPX | Insperity Business Services | Data Files | OrgPlus Organizational Chart |
| .PRINTEREXPORT | Microsoft Corporation | System Files | Windows Printer Migration File |
| .PP | Geckonization | Data Files | Pocket Physics Sketch File |
| .PDT | Microsoft Corporation | Data Files | InkWriter Note Taker Template File |
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