anyone know how to take a screenshot of an entire website?

doing some manual spying and wonder if anyone knows how to make a copy of an entire website to reference and add to my notes? i usually screenshot the top of it and put a link to it, but sometimes they go down. i know you can do save as -> PDF, but it kills some of the formatting. i know you can also use a tool like landerpro i think its called where it copies the entire page.

but just looking for a basic tool to make a copy of it with an image the whole thing to reference later. anyone use ...