CHM is short for Compiled Help Manual, it is a file format for online help files, developed by Microsoft and first released in 1997 as a successor to the Microsoft WinHelp format. Chm was first introduced with the release of Windows 98, and is still supported and distributed through Windows XP, Vista and Windows 7 platforms.
Chm file is widely used for software manual, documents or e-books. We can view search, or add keywords in chm file, it's a very handy for reader to find out any possible information. Generally, chm file was generated by Microsoft HTML Help Workshop which is a free tool, and there are also a lot of third-party Help authoring tools that can make html into CHM.
PDF file is a very popular document format, created by Adobe in 1993. PDF file is most universal document format on all kinds of platform, such as Windows, Mac, Linux, Mobile phone, table pc.
Pdf is an open standard format, there are a number of 3rd tools to read, make or edit pdf file. For more information about PDF file, please visit PDF file on wikipedia.
Sometimes we get a security alert when we open a chm file in windows platform, because Microsoft announced that chm contains security risks, and they seems to abandon chm format in the future. Chm will be replaced by a new help file. As such, you may convert your documents in chm format into a popular format(such as pdf) to rescue your files or documents in chm format for future demand.
Sometimes you may share help file, manual or e-books with customers and visitor, in order to make sure the file can be opened and viewed on different platform, such as MAC, Linux, iPhone, iPad etc, you may need a converting tool to convert chm to the possible format, however as we all know pdf is the most popular document format, and is widely used on different platform, your best bet is to convert your chm to pdf.
Atop CHM to PDF Converter is a handy and easy to use tool that converts chm to pdf with only one click. It helps you to convert any e-books, documentation or manuals in CHM to PDF with customized output settings, such as bookmarks, page cover, table of contents, header & footer,chapter name, page number etc. It's developed by Atop System on Jan 16,2011.
With Atop CHM to PDF Converter, you can convert you chm to pdf with different page size, orientation and margins, even set up a bookmars, or so called content tree or table of content in chm files. You can add page conver to pdf, add header and footer with title, section name, page number and total pages or your copyright information to aviod unauthorised use of your file or protect your copyright.
Atop CHM to PDF Converter runs on Microsoft Windows 2000, XP, Vista or 7(x-32 & x-64).
Click here to download Atop CHM to PDF Converter, and install in your PC.

Click Save button to save on you disk.
Double click atopchmtopdf.exe that you just downloaded.
If your systems is Vista or Win 7, there are a UAC alert windows, Install and execute Atop CHM to PDF Converter is 100% safe and clean, Please click Yes button to install it.

After install and register, the main window of Atop CHM to PDF Converter shows as below.

Click Add file(s) on main window. select chm files that you want to convert. If you want to modify Title of CHM, right click the item in file list and select Edit Title.

Modify title and click OK button.
Click Convert button on main window, a progessing window will be showed.

After few miniutes(depends on the size of chm files), convert job is done.

If you want to view PDF files, click Yes button, it'll open by your PDF read program.

If you want to use customized features of Atop CHM to PDF Converter to pdf files, click PDF Setting button on main window, and customized your output pdf files.

Copyright @2011 Atop System