CHM field Leave feedback On this page CHM field See Also CHM field The CHM file format represents Microsoft HTML help file that consists of a collection of HTML pages. It provides an index for quick accessing the topics and navigation to different parts of the help document. Learn more about this file format here. See Also class WebFileType Was this page helpful? Not really Yes, thanks Any additional feedback you'd like to share with us? Skip Send Please tell us how we can improve this page. Skip Send Thank you for your feedback! We value your opinion. Your feedback will help us improve our documentation.