Which tool is used for automatic file format identification?

The tool used for automatic file format identification is DROID. DROID, which stands for Digital Record Object Identification, is specifically designed to analyze files and provide information about their format. It utilizes a comprehensive and regularly updated file format registry, known as PRONOM, to recognize and identify file types based on their signatures and metadata. This automated process helps institutions and individuals manage digital files, particularly in archiving and preservation contexts, where understanding file formats is crucial for long-term access and usability.

Other tools, while maybe useful in their own right, do not focus on automatic file format identification in the same way. For instance, a PDF Converter primarily converts PDF files rather than identifying their formats. PRONOM supports DROID by serving as the file format registry, but it does not perform the identification function itself. FileZilla is a file transfer client, which is not related to file format identification but rather to transferring files between servers and local machines.