File Extension Library

.CNT File Extension

  • Developer by: Microsoft
  • Category: System Files
  • Format: Text

What are .CNT files and how to open them?

Can't open .CNT file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CNT file.

What is a .CNT file extension?

.CNT file extension is created by Microsoft. .CNT has been classified as System Files. The format of .CNT file is Text.

.CNT is Help Contents File

Help file used by Windows and Windows applications; stores topics for a Help document (.HLP file) in a plain text format; commonly installed with an application that uses Microsoft Help as the help documentation format.

CNT files can be created with Microsoft Help Workshop, an older program for creating help documentation. Older help documents can be updated to the newer HTML Help Workshop format (.HHC files) using HTML Help Workshop.

NOTE: Do not open unknown CNT files, since there is a known security issue that exploits a buffer overflow condition allowing malicious code to be executed on the computer.

List of all softwares that can open the Help Contents File
Microsoft HTML Help Workshop

How to fix problems with .CNT files

  1. You need to update the application that you normally use to open .CNT files. Only the latest version of the software supports the current .CNT file format
  2. You need to check the .CNT file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)