CHM is the file extension for Microsoft Compiled HTML Help that is a proprietary format for online help files, developed by Microsoft and first released in 1997 as a successor to the Microsoft WinHelp format. It was first introduced with the release of Windows 98 crap.

There are three most popular tools to read CHM files in Linux: gnochm, xchm and kchmviewer.gnochmFirst CHM reader in our “review” is gnochm that is designed to integrate with Gnome. Among features of gnochm are:

  • Support for external ms-its links
  • Full text search support
  • Bookmarks
  • Configurable support for HTTP links
  • Support for multiple languages (be, cs, de, el, es, fr, hu, it, ja, pl, pt_BR, ru, sv, tr, vi, zh_CN, zh_TW)
  • Displays HTML page source

This utility is included into many Linux distributions repositories and as the result you can install it via one command in Ubuntu: sudo apt-get install gnochm. RPM packages and Source tarballs can be downloaded from here.

xchmAnother tool to read CHM files is xchm that is a cross-platform GUI front-end to chmlib. Originally it was written for UNIX systems (Linux, *BSD, Solaris), some time later xCHM has been ported to Mac OS X and Windows. xchm has several limitations like these: it can’t handle * .chm files packing .mht files and complicated non-Latin charsets. Downloadable files can be found here, plus xchm is assembled for wide range of Linux distributions (sudo apt-get install -y xchm will install xchm in Ubuntu and Debian).

kchmviewerAnother CHM reader for Linux is kchmviewer for KDE. Unlike most existing CHM viewers for Unix, it uses Trolltech Qt widget library, and could optionally use KDE libraries for better KDE integration. It does not require KDE, but may be compiled with full KDE support, including KDE widgets and KIO/KHTML.

The main advantage of kchmviewer is the best support for non-English languages. Unlike other viewers, kchmviewer in most cases is able to correctly detect the chm file encoding and show it. It correctly shows the index and table of context in Russian, Korean, Chinese and Japanese help files, and with new search engine is able to search in any chm file no matter what language it is written.

You can download source tarball from here or install Ubuntu and execute sudo aptitude install kchmviewer :)




  1. March 28, 2008  12:30 am by wsp Reply

    i've tried gnochm and xchm. i've noticed with gnochm sometimes the next buttons don't work. xterm they always work.

  2. Pingback : online spielautomaten

  3. Pingback : telecharger evrest poker

  4. July 5, 2008  9:43 pm by chris Reply

    I've just installed kchmviwer which seems to work pretty good, I'm impressed, thank you!

  5. December 27, 2008  11:31 am by Shubuntu Reply

    In my case kchmviewer seems very good and fine.

    Thanks a lot.

  6. July 5, 2009  6:28 pm by navin Reply

    thank's a lot

  7. January 25, 2011  5:49 am by relationship help Reply

    Thanks for the information and great post indeed. I have to say your writing ability is beyong exceptional!

  8. January 26, 2011  11:30 am by julia Reply

    I precisely needed to appreciate you once again. I am not sure the things that I might have gone through in the absence of the entire opinions documented by you directly on such a problem. It had been a very frightening difficulty in my circumstances, however , looking at the skilled manner you managed that made me to jump over fulfillment. I am happier for this help and even hope you find out what a great job you are doing instructing others through the use of your site. I know that you have never encountered all of us.

  9. January 26, 2011  4:14 pm by Rosamond Gagnon Reply

    You made some decent points there. I did a search on the subject matter and found most people will approve with your website.

  10. February 5, 2011  10:35 pm by paginas de peliculas online gratis Reply

    Simply killing some in between class time on Digg and I discovered your article . Not usually what I favor to examine, nevertheless it was completely worth my time. Thanks.

  11. February 12, 2011  9:29 pm by perth business marketing Reply

    I've been gone for a while, but now I remember why I used to love this site. Thank you, I will try and check back more often. How frequently do you update your website?

  12. April 25, 2011  7:40 pm by try no no Reply

    The very easiest strategy to find laser hair removal in your area is probably referral and rather than from an physician that's getting a portion of the pie. I used to visit an Dr . for laser light treatments. I had blotchy hairy areas and had already been through all of those other hair removal processes. I got myself a sensepil and have not been happier. Finally I am hair free during the summer months. This will be an amazing yr for me.

Leave a reply


Your email address will not be published.