Wayback Machine

The Wayback Machine archives snapshots of web pages over time, letting you view a URL as it appeared on a given date.

Its uses go beyond nostalgia: recovering content from a site that went offline, checking what a company's pricing or claims said before they changed, and citing a source that has since been edited.

Coverage depends on whether a page was crawled at the time — frequently visited sites have dense history, obscure pages may have none.