LLB - LabVIEW Library File is a file extension that can be used for scalable tests and measurements. It is also used for control applications, and was created by LabVIEW. You will only be able to take advantage of this extension if you are already using this program. Everything that is featured within this program are all analyzed right on the computer. There are also very simple steps that you can take in order to create a new LLB file in LabVIEW. This extension is very handy and comes in handy for the type of features that are included.