| 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 |
|---|---|---|---|
| .DNG | Adobe Systems Incorporated | Camera Raw Files | Digital Negative Image File |
| .M4 | Open Source | Developer Files | Macro Processor Library |
| .DBL | Microsoft Corporation | System Files | Microsoft Windows XP Product Activation Data |
| .SOUNDS | id Software | Game Files | Quake 3 Engine Sound Definition File |
| ._VWDXSLN100 | Microsoft Corporation | Data Files | Microsoft Visual Studio File |
| .3MF | Open Source | 3D Image Files | 3D Manufacturing File |
| .RESMONCFG | Microsoft Corporation | Settings Files | Microsoft Windows Resource Monitor Settings |
| .DJVU | LizardTech | Raster Image Files | DjVu Image |
| .OFX | Intuit, Inc. | Data Files | Open Financial Exchange File |
| ._WDXSLN140 | Microsoft Corporation | Data Files | Microsoft Visual Studio Data |
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