Convert CBL to C

Considering that both .cbl and .c files typically store source codes, it should be possible to open both using any text editor. However, it is unlikely you can somehow convert cbl to c or vice versa directly, unless some kind of parser exists that can be used for the purpose of cbl to c conversion.

Simply put, it is impossible to convert CBL to C directly.
Thus, there is no so-called cbl to c converter or a free online .cbl to .c converter to be found.