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CHM File Extension

CHM file extension is created by Microsoft, also known as Compiled HTML Help File. CHM has been classified as Web Files. This File type categories under Zip, Text, Binary and XML, however, the format of this file format has not been determined yet. You can open CHM files in Apple Safari program.



Compiled HTML Help File Type

Compiled HTML Help File Type
Extension .chm
Developer Microsoft
Popularity 5.0 (1552 Votes)
Mime Type application/vnd.ms-htmlhelp
Default Program Apple Safari
Category Web Files
Format Binary
Updated 12/1/2024

What is a CHM File Type?

As the documentation was improved and progressed to web- and browser-based formats, the CHS format was largely removed. Most programs do not use more documentation; help based on CHM @ - @, and most programs that used to open CHM files are not maintained or n' open more CHM files.

All CHM files are compressed according to the LZX compression format.



Free online CHM Tools & Apps

We have also the free online .CHM (Compiled HTML Help File) file extension apps that can allow to view, edit, convert from to CHM, merge, split and compare the CHM files without installing anything on your system. Please click on the links to explore the complete list of details for each required feature.



CHM Files Common Issues

There are few common issues with the Compiled HTML Help File .CHM File Extensions while opening the .CHM files on Windows and MacOs, we have solution to those issues such as:

Can't Open CHM Files?

  1. You must have supported software programs installed for Compiled HTML Help File on your system such as Apple Safari.
  2. Associate default Apple Apple Safari program for *.chm (Compiled HTML Help File) files.

    Associate CHM Default Program on Windows
    1. Right-click a *.CHM (e.g example.chm) file and click Open With.
    2. In the Open with dialog box, click Apple Apple Safari program Or click Browse to locate the program (*.exe) that you want.
    3. Select check box for Always use this app to open .chm files.

    Associate CHM Default Program on MacOs
    1. Click *.CHM (e.g example.chm) file and click information -> Open With.
    2. In the programs list, click Apple Apple Safari program Or other appropriate program that you want.
    3. Confirm Change for all... and Contine.
    4. A message will appear "This change will be applied to all files with .Apple Safari extension. By clicking Continue you confirm your selection", click Contine to apply changes.


All Platform Software Programs for CHM File Extension

List of all softwares that can open the CHM files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Microsoft Windows logo image Open CHM File on Windows

Software License Developer
Calibre image. Calibre 3 for Windows Open Source Calibre
Cool Reader image. Cool Reader 3 for Windows Open Source Cool Reader
Microsoft Edge image. Microsoft Edge 80 for Windows Bundled Microsoft
Mozilla Firefox image. Mozilla Firefox 75 for Windows Open Source Mozilla
Microsoft Internet Explorer image. Microsoft Internet Explorer 11 for Windows Freeware Microsoft
Krasbit Technologies Chameleon image. Krasbit Technologies Chameleon 000 for Windows Paid Krasbit Technologies Chameleon
Zipeg image. Zipeg 2 for Windows Open Source Zipeg

MacOs logo image - FileProInfo.comOpen CHM File on Mac OS

Software License Developer
Calibre image. Calibre 3 for MacOs Open Source Calibre
Cool Reader image. Cool Reader 3 for MacOs Open Source Cool Reader
Microsoft Edge image. Microsoft Edge 80 for MacOs Bundled Microsoft
Mozilla Firefox image. Mozilla Firefox 75 for MacOs Open Source Mozilla
Apple Safari image. Apple Safari 12 for MacOs Bundled Apple
Zipeg image. Zipeg 2 for MacOs Open Source Zipeg

Linux logo image - FileProInfo.comOpen CHM file on Linux

Software License Developer
Calibre image. Calibre 3 for Linux Open Source Calibre
Cool Reader image. Cool Reader 3 for Linux Open Source Cool Reader
Mozilla Firefox image. Mozilla Firefox 75 for Linux Open Source Mozilla

Website logo image - FileProInfo.comOpen CHM file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen CHM file on iOS

Software License Developer
Microsoft Edge image. Microsoft Edge 80 for iOS Bundled Microsoft
Mozilla Firefox image. Mozilla Firefox 75 for iOS Open Source Mozilla
Apple Safari image. Apple Safari 12 for iOS Bundled Apple

Android logo image - FileProInfo.comOpen CHM file on Android

Software License Developer
Cool Reader image. Cool Reader 3 for Android Open Source Cool Reader
Microsoft Edge image. Microsoft Edge 80 for Android Bundled Microsoft
Mozilla Firefox image. Mozilla Firefox 75 for Android Open Source Mozilla

About Licensing

  1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
  2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
  3. Free+ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
  4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
  5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

CHM file extension icon image.About CHM - Compiled HTML Help File

FileProInfo is to help you understand about the Compiled HTML Help File with *.CHM suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for CHM. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

If you would like to suggest any additions or updates to this page for CHM, please let us know.

Updated 12/1/2024


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