Which Google search operator allows you to search results based on a file extension?

• A. inurl
• B. filetype
• C. site
• D. intitle

Answer: (B)

When you want results limited to a specific kind of file, you filter by the file format itself. The operator that does this is filetype:, followed by the extension you’re interested in. For example, filetype:pdf password policy will return only PDF documents that are relevant to password policy. This is especially handy when you’re looking for manuals, reports, or datasets in a known format.

Other operators serve different purposes: inurl filters results to URLs that contain certain text, intitle limits results to pages whose titles include your term, and site confines results to a specific domain. These don’t constrain by the file’s extension, so they won’t narrow results to a particular file type.