No Extension? No Problem: How to Identify Almost Any File Type

✏️ Got a mystery file with no extension or an ambiguous one? You may be able to uncover what it is by checking its signature. I’ll show you how to peek inside with a free tool and match the clues to known formats.

✏️ What kind of file is that?
You can figure out a file’s type by looking at its “signature” — the first few bytes of a file, which identify it. Use a hex editor like HxD to see those bytes and then match them to a file signature list. It’s not foolproof, but it can give strong clues.

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✅ Watch next ▶ How Do I View Hidden Files and Folders? ▶ https://youtu.be/1eWXJXO9W9g

Chapters
0:00 Identify Almost Any File Type
0:40 File signatures
2:30 Examining files with HxD
4:30 Check Wikipedia

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