Internet Archive-s Wayback Machine -

It has saved web pages since 1996.

: A manual tool that allows anyone to instantly archive a specific webpage. You can use this feature directly on the Internet Archive's Save Page Now or via a browser extension. Internet Archive-s Wayback Machine

Here's how it works:

To display a page from 2003, the machine must rewrite the links. If the old page tries to load style.css from the live server (which might not exist anymore), the Wayback Machine redirects that request to its own archive version of style.css . Without this step, archived pages would look broken. It has saved web pages since 1996