The web is ephemeral: webpages change, are superseded and vanish. Web archives have kept copies since 1996, but their records are scattered across institutions and frequently read one webpage at a time.
Strata brings these records together, laying down the archived history of each URL as a layer, or stratum, on a single timeline. Sort the layers, switch to charts of survival and growth, filter by web archive or type of URL, or search for a single address.
The demo explores The University of Edinburgh's web estate (ed.ac.uk): 8,706 URLs from 14 web archives, gathered in August 2026. Read more
Reading the timeline
Hover over the line to see what each part shows
Navigation controls are listed under Controls, at the bottom right of the page.
Explore your own data
Run Pluto on a domain or a list of URLs to gather their archived history
Click Upload data and choose Pluto's results folder, or drag it onto this page
Your data stays in your browser. Nothing is sent to a server.