Microsoft Compiled HTML Help is a Microsoft proprietary online help format, consisting of a collection of HTML pages, an index and other navigation tools. The files are compressed and deployed in a binary format with the extension .CHM, for Compiled HTML. The format is often used for software documentation.

CHM was introduced as the successor to Microsoft WinHelp with the release of Windows 98 and is still supported in Windows 7. Although the format was designed by Microsoft, it has been successfully reverse-engineered and is now supported in many document viewer applications.

You can convert CHM to PDF by our online program, PDFConvert desktop software or command line program.

CHM to PDF Converter Form
Local CHM File:		(*.CHM)

1. Click the "Choose File" button (different web browsers may have different button names such as "browse..."), a browse window will open, select a local CHM file and click the "Open" button.
2. Click the "Convert Now!" button to convert. Wait a few seconds for the file conversion to finish.
3. You can download or view the output PDF file on your web browser after conversion. No email address required to receive files.

After installing PDFConvert software, click Start - Programs - PDFConvert - PDFConvert to run.

Click "Create PDF" link, click "CHM to PDF" button on the left, click "Add Files" button to add local CHM files. You can also directly drag CHM files from file explorer and drop to list.

After adding CHM files into the list. You can click the "Create PDF" button to create PDF file from the document files you selected.

The default output directory is "PDFConvert" directory in "My Document". PDFConvert will try to create this directory if it doesn't exist and open it when conversion is completed.

Download pdfconvert.exe, and run pdfconvert.exe command line program to convert CHM to PDF on background without windows showed.

/?

Shows all command line parameters of pdfconvert.exe.

/i

input files

For example: pdfconvert.exe /i "c:\chm\1.chm"

/o

output folder

For example: pdfconvert.exe /o "c:\pdf"

/cs 5000

convert CHM file to pdf file

For example: This command will convert local CHM file "c:\chm\1.chm" to PDF file "c:\pdf\1.pdf".
pdfconvert.exe /cs 5000 /i "c:\chm\1.chm" /o "c:\pdf"