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CNT HHC
File conversion

Convert CNT to HHC

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Is it possible to convert CNT to HHC?
Yes - CNT converts to HHC.

The meaningful modern migration: convert the whole WinHelp project (.hlp + .cnt) to HTML Help (.chm), whose table of contents is an .hhc file. Tools like HelpSmith, Help+Manual or HTML Help Workshop import WinHelp and regenerate the TOC.

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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How to convert CNT to HHC

Converting a .CNT file to .HHC lets you open the content in software that prefers the .HHC format, though some details may change compared with the original. We are still putting together the list of programs that handle .CNT files.

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

About these formats

.CNT Microsoft Help Contents File

A CNT file is a plain-text table-of-contents script that belongs to a Windows Help (.hlp) file from the WinHelp era (Windows 3.x through XP). Open it in Notepad or any text editor. The main…

Open .CNT details →
.HHC HTML Help Table Of Contents file

A .HHC file is associated with HTML Help Table Of Contents, a system file.

Open .HHC details →