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TTCN file extension

The table below provides useful information about the .ttcn file extension. It answers questions such as:

  • What is the .ttcn file?
  • What program do I need to open a .ttcn file?
  • How can the .ttcn file be opened, edited or printed?
  • How can I convert .ttcn files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ TTCN-3 Script

TTCN file is a TTCN-3 Script. TTCN-3 (Testing and Test Control Notation version 3) is a strongly typed testing language used in conformance testing of communicating systems.
TTCN format description not yet available
Application: TTCN-3
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
TTCN aliases:
TTCN related links:
TTCN related extensions:

Other types of files may also use the .ttcn file extension.

🚫 The .ttcn file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

tcn, ttc, ttn

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Hotword Connection Translator Source
TrueType Font Collection
Bentley InRoads Topologically Triangulated Network Data

🔴 Can't open a .ttcn 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:


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 .ttcn 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 .ttcn file extension, write to us!

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