.CHM File Extension

Compiled HTML Help File

What is a CHM File?

A CHM file, or Compiled HTML Help file, is a proprietary format developed by Microsoft. It is used primarily for software help documentation. CHM files contain a combination of text, images, and hyperlinks, all compressed into a binary format. They are typically utilized by Windows applications to provide users with help manuals integrated into the software.

How to Open CHM Files

CHM files can be opened natively on Windows using the HTML Help executable program (hh.exe) that ships with Windows. Additionally, various third-party CHM viewers are available for both Windows and other platforms like macOS and Linux. Some web browsers might also manage to open CHM files, but a dedicated viewer or editor provides better functionality and user experience.

Can CHM Files Be Converted?

Yes, CHM files can be converted into formats such as PDF, HTML, and DOCX. This conversion can be useful for archiving or making the content more accessible on devices without CHM viewer support. Various online tools and software applications offer conversion services.

Technical Information

FieldDetail
Format TypeBinary
Created byMicrosoft
File TypeWeb/Help Documentation
UsabilityPrimarily used in Windows environments

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