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Show or hide file name extensions – Windows Help

A file name extension is a set of characters added to the end of a file name that determine which program should open it. For more information, see File names and file name extensions: frequently asked questions.

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One Response to Show or hide file name extensions – Windows Help

  1. This comes in handy when you want to email an executable to somebody which a filter is set up to disable to strip the attachment. If the file extension is visible, it can be changed locally and modified back to it’s original extension by the email recipient to later be run.

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