Having problems opening a CHM file?

We have programs that can open or convert your CHM files.

Opening CHM files

Did your computer fail to open a CHM file? We explain what CHM files are and recommend software that we know can open or convert your CHM files.

What is a CHM file?

Files with the .chm extension are most commonly associated with Microsoft help documentation files. The CHM files are compiled to create the help contents of an associated application. These files are normally saved in compressed HTML format and include the images, text and hyperlinks contained in the help files.

The .chm file extension is also used for Chameleon source font files and Chemdraw chemical structure files.

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About File Extension CHM

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CHM file format or software that uses files with the CHM suffix, please do get in touch - we would love hearing from you.