What is an MTGL file? An MTGL file is a graph created by Maltego, a data mining and information gathering application that allows investigators to find and view connections between disparate data sets. It contains a visual representation of the connections between data. MTGL files can be opened only in Maltego.

More Information Maltego allows intelligence analysts and investigators to enter a piece of data, such as a website's domain name or a person's email address, and search a number of open and private databases for information related to that data. Investigators can then use the data they find to continue searching for even more related data, creating an information network that includes a score of names, email addresses, locations, phone numbers, and website information. These information networks, which contain arrows indicating how various pieces of information relate to each other, are called Maltego graphs, and they are saved as MTGL files. Investigators can share MTGL files with each other to allow others to add to or analyze their investigations.