Microsoft HTML Help (chm) viewer.ExtraCHM provides full free functionality of standard Microsoft CHM viewer (hh.exe) and more.

However, advanced features are available only for registered users. Registration keeps you registered for all further versions of ExtraCHM. For registration ExtraCHM uses Plimus- popular secure payment provider. Your registration code will be sent to your email within one day.

With ExtraCHM you may:
1. View documents in a modern multi-tabbed interface.
2. Bookmark pages and text selections.
3. Decompile chm file. This will convert chm to html.
4. Improve readability by changing the size of the text even for fixed size texts.
5. Zoom entire content.
6. Change application view.
7. Print and save document pages.

Features available for registered users:
1.Advanced search
* Introduces search results in a way Google Search does.
* Does not require search index presence in CHM file.
* Supports CHM files of any language.

2.Text To Speech
* Allows your computer to read chm documents with Natural Voices.

The license of this software is Freeware, you can free download and free use this file management software.