Qt help project file
File type: Document file
A .qhp file is a Qt Help project file. It stores the project data used to build documentation for applications created with the Qt development framework.
The file is an XML-based document that describes the documentation's contents, indices, and source files.
File type category:
Document file
Date updated: November 2, 2026
The qhp file extension is associated with Qt, a development framework from The Qt Company for creating desktop, embedded, and web applications. A .qhp file defines a documentation project rather than containing the complete rendered help system.
It identifies the documentation files used by the project and defines the table of contents, keyword indices, references, and a unique namespace for the documentation. The Qt Help tools use this information to generate a compiled help collection.
The format is used with the Qt SDK and related Qt development tools on Microsoft Windows.
On Microsoft Windows, open a .qhp file in a text or XML editor to inspect or edit its project definition. The qhelpgenerator tool included with the Qt SDK processes the file to build the corresponding Qt help collection; the project file is not normally opened as a standalone help document.
A .qhp file is normally compiled rather than converted. Use the qhelpgenerator tool from the Qt SDK to generate a compiled Qt help collection file for use with Qt Help or Qt Assistant.
Software applications that can open qhp files:
Microsoft Windows
Software applications that can edit qhp files:
Microsoft Windows
Software capable of saving qhp files:
Microsoft Windows
Software apps that create qhp files:
Microsoft Windows
Software applications that handle other tasks involving qhp files:
Microsoft Windows
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