Opening CM3 Files

The CM3 file type is primarily associated with CaseMap.

CM3	File extension: CM3
	File type:	Version 3.x Case Analysis File

What is a CM3 file?

CM3 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 a CM3 file

You need a suitable software like CaseMap to open a CM3 file. You need a suitable software like CaseMap from LexisNexis to open a CM3 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 CM3 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CM3 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CM3 Text Viewer

Choose your .cm3 file to analyze

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Online File Viewer

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4 Steps to Open an Unknown .CM3 File

Because .CM3 files may originate from different programs, they aren't universally openable.

Identify the Source: If received from legal professionals or litigation workflows, it is likely a LexisNexis CaseMap Version 3.x Case Analysis File.
Check the Header: Inspect the first bytes in a hex viewer or text editor.
- "PK" indicates a zipped archive.
- Readable XML/JSON suggests a structured text format.
- Unreadable binary data often points to a proprietary database.
Use the Original Software: The original program is usually required. Try LexisNexis CaseMap, or ask the sender what software they used if you remain uncertain.
Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for CM3 File Extension

Related files:

sm3, cr3, msh, cm4, ct5, cm5

a cm3 Version 3.x Case Analysis File is a special file format by LexisNexis and should only be edited and saved with the appropriate software.

How to solve problems with CM3 files

Associate the CM3 file extension with the correct application.
Update your software that should actually open version 3.x case analysis files. Because only the current version supports the latest CM3 file format. Search, therefore, e.g. on the LexisNexis manufacturer website after an available CaseMap update.
To make sure that your CM3 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .CM3 file online - secure, fast, and no downloads needed.