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What Is a File Format and How Do You Identify an Unknown One?

A file format is the internal structure that tells software how to read and interpret a file's contents; the file extension is ju…

What Is a File Type and How Do You Identify an Unknown One?

A file type is the format that defines how data inside a file is structured—text, image, audio, spreadsheet, archive, and so on. …

How to Open a File with an Unknown Extension

To open a file whose extension you don't recognize, first confirm the extension from the filename or your system's file propertie…

What Are File Extensions and How Do You Identify Unknown File Types?

A file extension is the suffix at the end of a filename—the part after the final period, like .pdf or .jpg—that tells your operat…