What is a CAL file?
A .CAL file is primarily a CALS Raster Image file. The CALS Standard stores black-and-white graphic images. Government agencies and the military originally developed this format to standardize digital document exchange.
However, a .CAL file can have multiple meanings. It is often a Calendar File created by Broderbund software or a Microsoft Publisher calendar document. Other applications use the .CAL extension for internal data storage. These include SuperCalc spreadsheets, Autodesk 3ds Max pose adjustment files, CryENGINE character animation lists by Crytek, INESCOP ICad footwear CAD projects, and Danea Domustudio management files.
How to open CAL files?
Because .CAL has multiple possible meanings, you must identify the actual format of the file to open it correctly. If the file is a CALS Raster Image, standard image viewers like IrfanView or XnView can open it. If it is a Calendar File, you will need the specific Broderbund software or Microsoft Publisher application used to create it.
To remove the guesswork, viewer.online/cal analyzes .CAL files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Software and tools
If you possess a CALS raster image, we strongly recommend file conversion to sensible target formats. You can use convert.guru to easily convert your .CAL file into a .PNG, .JPG, or .PDF document. This makes the image instantly compatible with modern web browsers and mobile devices.
Summary
viewer.online/cal directly opens and previews .CAL files in the browser, eliminating the need to install software or troubleshoot compatibility issues.