A daily updated filename extension database!

HPJ file extension

The table below provides useful information about the .hpj file extension. It answers questions such as:

  • What is the .hpj file?
  • What program do I need to open a .hpj file?
  • How can the .hpj file be opened, edited or printed?
  • How can I convert .hpj files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Windows Help Project

Windows Help Project .hpj file icon
HPJ file is a Microsoft Windows Help Project.
Category: Project files
Application: Visual Studio
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
HPJ aliases:
HPJ related links:
HPJ related extensions:
Windows Help Content

Windows Global Index File

Windows Help File

Compiled HTML Help

Answer Wizard Index

HTML Help Table of Contents

Windows Help Project

Compressed HLP File

MS Help 2 Project Attribute Definition

MS Help 2 Project Collection Definition

Other types of files may also use the .hpj file extension.

🚫 The .hpj file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

bpj, gpj, hj, hlj, hp, hph, hpi, hpk, hpm, hpn, hpy, mpj, npj, phj, pj

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

gINT Project
messiahStudio Project
HP NewWave EMM Text
HPack Compressed Archive
Project64 Saved State File
Habanero-Java Source Code
Adobe RoboHelp HTML Project
Harpoon Classic Game Data
Tropico 3 Game Data
NI TestStand Project

🔴 Can't open a .hpj file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .hpj file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .hpj file extension, write to us!

Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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