Convert CHM Online


CHM - Microsoft Compiled HTML Help


Format introduction:

Microsoft Compiled HTML Help is a Microsoft proprietary online help format, consisting of a collection of HTML pages, an index and other navigation tools. The files are compressed and deployed in a binary format with the extension .CHM, for Compiled HTML. The format is often used for software documentation.

Technical details:

Help is delivered as a binary file with the .chm extension. It contains a set of HTML files, a hyperlinked table of contents, and an index file. The file format has been reverse-engineered and documentation of it is freely available. CHM files support the following features: data compression, built-in search engine, ability to merge multiple .chm help files, extended character support.


File extension .chm
MIME application/
Developed by Microsoft
Type of format Document file format
Associated programs Sumatra PDF, HTML Help Workshop
Sample file sample.chm
Wikipedia CHM on Wikipedia


The list shows what formats can convert to CHM and what formats can be converted from CHM. Click on a link below to start a specific conversion.

# Conversion Type Position
1 CHM to PDF document FROM CHM
2 CHM to HTML document FROM CHM
3 CHM to TXT document FROM CHM
4 CHM to DOC document FROM CHM
5 CHM to DOCX document FROM CHM
6 CHM to RTF document FROM CHM
7 CHM to EPUB ebook FROM CHM
8 CHM to AZW ebook FROM CHM
9 CHM to FB2 ebook FROM CHM
10 CHM to MOBI ebook FROM CHM
11 CHM to JPG image FROM CHM