Notepad is a generic text editor included with all versions of Microsoft Windows that lets you create, open, and read plaintext files with a .txt file extension.
Notepad is a basic text editor that's built into Windows. It is excellent for writing relatively short text documents that you want to save as plain text. However, that's not all you can do with it. If you have not used Notepad much, or ever, you may be surprised by how easy it is to work with.
Notepad++ is a free (as in “free speech” and also as in “free beer”) source code editor and Notepad replacement that supports several programming languages. Running in the MS Windows environment, its use is governed by GNU General Public License.