Highlighting text in the default Windows CHM viewer

I just found Kchmviewer. It looks really good with:

  • Windows, Mac and Linux.
  • Easy navigation: ctrl + left or right arrow keys to navigate next or previous sections
  • Tabbed interface
  • Ability to change font size
  • Allows you to add your own persistent bookmarks
  • Excellent search even for files without and index
  • Highlights text just fine

I've installed it on Windows 7 64-bit and it works great:

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There is a handy Firefox add-on called CHM Reader which allows you to open CHM files within Firefox:

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To achieve the highlighting support you're after you can use TextMarker!, another useful add-on:

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Of course, it will work on any platform with Firefox installed.


HelpExplorer is a full-featured help viewer for both Windows and Linux. One of its main advantages is 100% support of the WinHelp (.hlp), MS HTML Help 1.x (.chm) and MS Help 2.0 (.HxS) help file formats that are widely used in Windows, which lets you use the same online help files for cross-platform applications running under Linux and Windows. Another great advantage of Help Explorer Viewer is its easy integration into your applications.

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There is a little problem, though. The program is officially shareware, but you can't really pay for it since the company seems to have vanished from the face of the earth and all links are dead. However, it does the job and works with all Windows versions, it doesn't expire, there's no nag screen and it can be made portable. I'm quite happy with it.

HelpExplorer also allows you to highlight (and copy) text and images:

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