Opening a CT4 File

The CT4 file type is primarily associated with CaseMap.

CT4File Extension CT4
File extension: CT4
File type:  Version 4.x Case Analysis Template File

What is a CT4 file?

CT4 files mostly belong to CaseMap by LexisNexis. CaseMap is a case analysis tool that allows you to organize and explore the facts, the cast of characters, and the issues in any legal case. CaseSoft, Ltd was acquired by LexisNexis 24 July 2006.

How to open CT4 files

You need a suitable software like CaseMap to open a CT4 file. You need a suitable software like CaseMap from LexisNexis to open a CT4 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CT4 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CT4 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CT4 Text Viewer

Choose your .ct4 file to analyze

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

Unable to Open a .CT4 File? Quick Solutions:

CT4 files can come from different programs and aren't universally openable.

  1. Identify the Source: If received from a legal professional or litigation team, it is likely a LexisNexis CaseMap Version 4.x Case Analysis Template File.
  2. Check the Header: Open the file in a text editor or hex viewer to inspect the first few bytes:
    • Readable text or XML suggests a structured template.
    • "PK" indicates a zipped archive.
    • Unreadable binary data often points to a proprietary database format.
  3. Use the Original Software: The original program is usually required; try using LexisNexis CaseMap, or ask the sender if you are uncertain.
  4. Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for CT4 File Extension

File classification:
Database
Related files:

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: CPCView.C4Doc
EXEFile: %ProgramFiles%\Internet Explorer\iexplore.exe %1

ProgramID: CPCView.C4Doc
EXEFile: %ProgramFiles%\MOZILL~1\FIREFOX.EXE

ProgramID: CT4File
EXEFile: %ProgramFiles%\CaseSoft\CaseMap 4\Casemap.exe


a ct4 Version 4.x Case Analysis Template File is a special file format by LexisNexis and should only be edited and saved with the appropriate software.

How to solve problems with CT4 files

  • Associate the CT4 file extension with the correct application.
  • Update your software that should actually open version 4.x case analysis template files. Because only the current version supports the latest CT4 file format. Search, therefore, e.g. on the LexisNexis manufacturer website after an available CaseMap update.
  • To make sure that your CT4 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .CT4 file online - secure, fast, and no downloads needed.
Drop here
View another file
CT4 file viewer CT4 file description