Editing Wayback Machine

The '''Wayback Machine''' is the public interface of the [[Internet Archive]]'s web collections, allowing users to view historical snapshots of websites by URL and date. It has operated since the late 1990s and is among the most widely used [[Web archiving]] tools for research, journalism, legal discovery, and everyday nostalgia.

==How it works==
Crawlers fetch publicly reachable pages and store them (commonly in [[WARC]]-family formats). Users can browse a calendar of captures or use '''Save Page Now''' to request a fresh snapshot of a living URL. Coverage is uneven: robots exclusions, login walls, blocked bots, and JavaScript-heavy sites limit what can be stored.

==Scale and milestones==
In October 2025 the Internet Archive reported that the Wayback Machine had surpassed '''one trillion''' archived web pages—a civilisation-scale milestone for public web memory. Partnerships have included repairing millions of broken links on Wikipedia and End of Term crawls of U.S. government sites.

==Limits==
Archives are not complete mirrors of the live web; playback can omit ads, personalised content, or streaming media. Legal challenges, bandwidth costs, and site operators blocking archival bots remain ongoing risks for custodians and users.

==See also==
* [[Internet Archive]]
* [[Brewster Kahle]]
* [[Link rot]]
* [[Heritrix]]
* [[Archive.today]]

==Sources==
* Internet Archive Blogs, announcements on the one-trillion-page milestone (2025).
* Internet Archive documentation for Save Page Now and the Wayback Machine.
* Secondary reporting on web-archive use in journalism and scholarship.

[[Category:Web archiving]]
[[Category:Digital preservation]]
[[Category:Tools]]