QHP file icon

QHP File Extension

Qt Help Project
  • Developer
    Digia Oyj
  • Category
    Document Files
  • Popularity
    0 ( votes)

What is QHP file?

QHP filename suffix is mostly used for Qt Help Project files. Digia Oyj defined the Qt Help Project format standard. QHP file format is compatible with software that can be installed on Windows system platform. QHP file format, along with 574 other file formats, belongs to the Document Files category. The most popular software that supports QHP files is Qt SDK. Qt SDK software was developed by Digia Oyj, and on its official website you may find more information about QHP files or the Qt SDK software program.

Programs which support QHP file extension

Below is a table that list programs that support QHP files. Files with QHP suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Programs that support QHP file

Windows Windows

How to open file with QHP extension?

Problems with accessing QHP may be due to various reasons. Fortunately, most common problems with QHP files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Download and install Qt SDK

Install software to open QHP file The main and most frequent cause precluding users form opening QHP files is that no program that can handle QHP files is installed on user’s system. To address this issue, go to the Qt SDK developer website, download the tool, and install it. It is that easy The full list of programs grouped by operating systems can be found above. The safest method of downloading Qt SDK installed is by going to developer’s website (Digia Oyj) and downloading the software using provided links.

Step 2. Verify the you have the latest version of Qt SDK

Update software that support file extension QHPYou still cannot access QHP files although Qt SDK is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Qt SDK cannot handle files with QHP may be that the software is outdated. The latest version of Qt SDK should support all file formats that where compatible with older versions of the software.

Step 3. Associate Qt Help Project files with Qt SDK

After installing Qt SDK (the most recent version) make sure that it is set as the default application to open QHP files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Associate software with QHP file on Windows

The procedure to change the default program in Windows

  • Choose the Open with entry from the file menu accessed by right-mouse clicking on the QHP file
  • Click Choose another app and then select More apps option
  • Finally select Look for another app on this PC, point to the folder where Qt SDK is installed, check the Always use this app to open QHP files box and conform your selection by clicking OK button
Associate software with QHP file on Mac

The procedure to change the default program in Mac OS

  • By clicking right mouse button on the selected QHP file open the file menu and choose Information
  • Open the Open with section by clicking its name
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • A message window should appear informing that This change will be applied to all files with QHP extension. By clicking Continue you confirm your selection.

Step 4. Check the QHP for errors

Should the problem still occur after following steps 1-3, check if the QHP file is valid. Problems with opening the file may arise due to various reasons.

Check QHP file for viruses
1. Verify that the QHP in question is not infected with a computer virus

Should it happed that the QHP is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. QHP file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with QHP extension is complete and error-free

If you obtained the problematic QHP file from a third party, ask them to supply you with another copy. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. If the QHP file has been downloaded from the internet only partially, try to redownload it.

3. Check if the user that you are logged as has administrative privileges.

Some files require elevated access rights to open them. Log out of your current account and log in to an account with sufficient access privileges. Then open the Qt Help Project file.

4. Make sure that the system has sufficient resources to run Qt SDK

If the system is under havy load, it may not be able to handle the program that you use to open files with QHP extension. In this case close the other applications.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Qt Help Project files. It is possible that one of the available system or driver updates may solve the problems with QHP files affecting older versions of given software.

Do you want to help?

If you have additional information about the QHP file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on QHP file.

Top File Extensions
Show more
File Extension of the day
lbl icon


Database Label Format Format

LBL file extension is used by database label files supported by various database applications, including dBASE. LBL file stores a formatted label d...