CRL File

What are CRL files and how to open them

Are you having problems opening a CRL file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a CRL file?

A .CRL file is a Calamus Ruler List file.

A .crl file, also known as a Calamus Ruler List file, is a text document used by the professional desktop publishing software Calamus for the Atari ST platform. It contains information about the rulers and grids used in a Calamus document, such as the unit of measurement, size and position of rulers, and visibility settings.

The .crl file stores the settings for rulers and grids so that users can save them for reuse in different documents. With these settings, rulers can measure and align elements in a document to ensure accuracy, while grids act as references for positioning elements.

Calamus is an older software that is no longer widely used, so it's important to note that .crl files may not be compatible with modern desktop publishing programs.

How to open CRL files

Important: Different programs may use files with the CRL file extension for different purposes, so unless you are sure which format your CRL file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: January 27, 2023

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about CRL file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.