The Four Best Ways to Open CBL Files

The first way you should always try to open file extension CBL is to double-click it, but when that doesn’t work, there are a few other things you can try. There are lots of programs that can open different file extensions, and there are some simple ways you can tell which one to use.

Pick the Right Program

Start by choosing the right program to open your CBL file. A few of the most common programs used to open CBL files are listed below. One of them should be able to open your CBL file.

  • COBOL Program
  • CD Box Labeler Pro
  • Contextual Browsing Language Viewer
  • RM/COBOL Development System Source File
  • PDP-10 COBOL Compiler Source

Note the File Type

Other programs may be able to open your CBL file, depending on the type of file it is. You can find the file type listed in the file’s properties. On a Windows PC, right-click the file, click "Properties", then look under “Type of File.” On a Mac computer, right-click the file, click “More Info,” then look under “Kind”.


Tip: If it’s the CBL file extension, it probably falls under the Developer Files type, so any program used for Developer Files should open your CBL file.

Ask the Developer

Contacting the software developer is another easy way to get help opening a CBL file. You can find the developers for the most common programs used to open CBL files in the list below.

Software Developer
COBOL Program Microsoft Developer
CD Box Labeler Pro Green Point Software UK Ltd.
Contextual Browsing Language Viewer Unknown
RM/COBOL Development System Source File Liant
PDP-10 COBOL Compiler Source PC Software Company

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