ChmDecompiler

ChmDecompiler is an Chm file or ebook decompiler,it can decompile .Chm file or ebooks (ie.'Compiled Windows HTML Help files') and extract all source files from the ebook!   
  A batch decompiler for Compiled Windows HTML Help files (*.chm). ChmDecompiler can extract all/any source files in a MS .chm file or ebook easily and quickly,ChmDecompiler is also a easy-to-use .chm file viewer. 

Features:

Decompile a CHM Html help file or CHM ebook quickly and easily. 
Recover the .HHP project file perfectly. 
Decompile all MS CHM files / CHM ebooks in batch processing. 
Extract a/any files from a chm file or chm ebook. 
Convert any chm files to html freely. 
Manage CHM Html help file like a zip file. 
An excellent CHM file viewer or CHM file reader. 
Integration with Windows shell. 
Multilanguage support. 
Built-in chm files decompiler with batch processing. 
Easy-to-use interface. 

How does it work?  
 Simply select an .CHM file, press the 'Extract selected from a .chm' or 'Extract all from a .CHM' button, select a folder for output,and in a short time you'll get all source files of the .CHM file (these soucre file are saved in the folder you've selected)!   
 
With ChmDecompiler, you also can decompile .CHM files in a batch: select 'Batch decompilation' from the file menu,and select the in/out folder that contains Chm file or ebooks ,then select a output folder,press the 'Start' button,all ebooks are decompiled quickly.   
 
What can I do with it?   
Extract all source files from a Chm file or ebook ,then you can edit and recompile those source files,that's all.ChmDecompiler support decompile .CHM in a batch,and it's also a 'CHM Reader' or 'CHM Viewer'.