The source code to this site is open source and it's under the MIT License, so this means anyone is allowed to take a copy and make modifications. While this is not absolutely necessary it would be greatly appreciated if credit is given.

How do I give credit?

You can give credit anywhere on the site but it's common to add it in the footer, here's an example:

Credit Screenshot

(site currently inactive)

If you run into any issues with this then please feel free to raise an issue on the GitHub repository and I'll be able to assist you there.