Wayback Machine is a helpful Chrome extension that allows you to quickly access numerous archived web pages.It has happened to us all at one time or another; you go to your favorite page or link and they are gone. Wayback Machine vast amounts of pages within its archives and allows you to go back to a previous date and retrieve what you were looking for. Literally, millions of sites with their associated data (images, source code, documents, etc.) are conveniently saved in this database. Wayback Machine is perfect for seeing what a past version of a website looked like and it will permit you to grab the original source code from any site that may not be readily available for whatever reason. You can also gain access to websites that are no longer in existence. It can also perform automated detection of 404, 408, 410, 451, 500, 502, 503, 504, 509, 520, 521, 523, 524, 525, and 526 error codes and check to see if there are archived versions of the URLs available.