ExtraCHM icon

ExtraCHM

ExtraCHM is a free CHM file reader for Windows. It can open and read Compiled HTML (.chm) files and allows easy navigation and search within those files. ExtraCHM is lightweight, fast, and supports features like bookmarks and printing.

What is ExtraCHM?

ExtraCHM is a free, open-source CHM file reader and browser for Windows. CHM stands for Compiled HTML and is a common file format used for software documentation and help files.

Key features of ExtraCHM include:

  • Lightweight and fast - uses little memory or CPU
  • Supports CHM version 1.0 up to latest 3.0
  • Tabbed interface for opening multiple CHM files
  • Table of contents, index, search, bookmarks
  • Printing support
  • Customizable interface colors
  • Portable version available

ExtraCHM is easy to use even for less tech-savvy users. It opens quickly and makes navigating CHM help contents intuitive. The search feature allows finding information fast across all opened CHM files.

It's a good alternative if you need to open CHM files and the default Windows help viewer doesn't work well or lack features you need. Being open-source means ExtraCHM is free to use with no ads or unwanted bundles.

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