CFN file - How do I open a .cfn file?
The table below provides useful information about the .cfn file extension. It answers questions such as:
- What is the .cfn file?
- What program do I need to open a .cfn file?
- How can the .cfn file be opened, edited or printed?
- How can I convert .cfn files to another format?
Table of Contents
- ✅ Calamus Font Data
- 🔄 .cfn file converters
- 🚫 .cfn file related errors
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ Calamus Font Data

The CFN file is a Calamus Font Data. Calamus is a highly modular Desktop Publishing (DTP) system from invers Software.
Other types of files may also use the .cfn file extension.
🚫 The .cfn file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .cfn file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.cfn
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .cfn file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .cfn file extension, write to us!