The File Extensions Database

.COB File Extension

  • Category: Developer Files
  • Format: Text

What is an .COB file?

.COB is COBOL Source Code File

Source code file written in COBOL, an older programming language used for developing business, finance, and administrative applications; still used by many enterprise business applications.

COBOL has several variants, including COBOL-68 (the original standard) and COBOL 2002, a more recent version of the language. Therefore, make sure you have the appropriate compiler and text editor for the version of COBOL you're using for development.

Programs that open COBOL Source Code File
Alchemy Solutions NetCOBOL

How to solve problems with COB files

  • Associate the COB file extension with the correct application. On :
    Windows: Right click on any COB file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.COB files". Mac: Right click (or Ctrl-click) the COB file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .COB is COBOL Source Code File. Because only the current version supports the latest COB file format. Search, therefore, e.g. on the N/A manufacturer website after an available .COB is COBOL Source Code File update.
  • To make sure that your COB file is not corrupted or virus-infected, get the file again and scan it with antivirus software.