Finding Hidden File Format Issues with DROID: An Essential Tool for Digital Preservation

If you are responsible for digital archives or long-term preservation, you have surely wondered, “Is this file really in the format its extension suggests?” This time, I introduce “DROID,” a powerful tool that resolves such doubts, along with actual analysis results. What is DROID? DROID (Digital Record Object Identification) is a file format identification tool developed by The National Archives (UK). It identifies the true format by analyzing not just the file extension but the internal structure (signature) of the file. ...

November 3, 2025 · 9 min · Nakamura