With the move to browser-based help articles and a preference for other e-book formats, the CHM file format has become obsolete. To save your CHM documents in a format that's more easily accessible and shareable, consider converting them to PDF using our free online tool. Simply upload your CHM files and watch them quickly convert to PDF, without watermarks or personal information. With CHM files becoming increasingly difficult to view, converting them to PDF is a critical step in saving and sharing CHM documents for future use.