WebCite

WebCite is an intermittently available archive site, originally designed to digitally preserve scientific and educationally important material on the web by taking snapshots of Internet contents as they existed at the time when a blogger or a scholar cited or quoted from it. The preservation service enabled verifiability of claims supported by the cited sources even when the original web pages are being revised, removed, or disappear for other reasons, an effect known as link rot.
As of June 2023, the site no longer accepts new archive requests; old archive snapshots can still be viewed.
The site is frequently offline with no explanation, and for lengthy periods of time.