Final Steps When you've entered all your data into Notepad, save your file as a text document and change its file extension to ".csv." ...

You can corrupt a document or file by opening it in Windows Notepad. Let us check out how! First, open the Notepad application on your computer and then click on the File > Open option.

Go back to NotePad and click the area where you'd like to place the text. Select "Edit," then "Paste." Save the document as a text file. Convert the file using an online converter.

Using a plug-in for the popular Windows text editor, Notepad++, you can easily encrypt selected text and entire text files.