How to open BLL files
Did your computer fail to open a BLL file? We explain what BLL files are and recommend software that we know can open or convert your files.
What is a BLL file?
BLL files are Borland Language Library files, which you can read more about below.
The BLL file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a BLL opener may not be able to open all kinds of BLL files. In this case, though, we only know of one specific use.
Borland Language Library
Through our analysis of BLL files, we know that one use of the format is Borland Language Library. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.
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BLL file openers, viewers, etc.
These apps are known to open certain types of BLL files. Remember, different programs may use BLL files for different purposes, so you may need to try out a few of them to be able to open your specific file.
![]() | BILL | User submitted |
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