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HLP HPJ
File conversion

Convert HLP to HPJ

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Is it possible to convert HLP to HPJ?
Yes - HLP converts to HPJ.

Reverse of the build step: a WinHelp decompiler regenerates the project (.hpj) and RTF sources from a compiled .hlp. The db pairing hlp->hpj reflects this decompile-to-source workflow.

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert HLP to HPJ

Converting a .HLP file to .HPJ lets you open the content in software that prefers the .HPJ format, though some details may change compared with the original. The programs listed below open .HLP files and can save or export them to .HPJ (or a closely related format). One of them is Microsoft Windows Help: Microsoft Windows Help is the documentation and help system built into Windows, encompassing the legacy WinHelp format, HTML Help, and the Microsoft Help 2….

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

Programs that convert HLP

Microsoft Windows Help
Adobe RoboHelp

About these formats

.HLP Windows Help File (WinHelp)

A HLP file is a compiled Windows Help (WinHelp) file used by programs from the Windows 3.0 era through Windows XP. Windows 10 and 11 no longer include the WinHelp engine, so double-clicking…

Open .HLP details →
.HPJ Microsoft Win Help project file

A .HPJ file is associated with Microsoft Win Help project, a system file.

Open .HPJ details →