See exactly what changed between any two websites or any two dated snapshots of one site.
PageTimeline puts a visual comparison between any two web pages, or any two dated snapshots of the same page, in one view. Pick two URLs, or pick two dates on a tracked site, and see the side-by-side with the differences marked, so you know what moved before you open a single tab.
Every site you track is captured every night as a full-page image plus its HTML, and a new snapshot is kept whenever the page has actually changed. The result is a private timeline for your own sites, with the dates it changed as the spine, so you can scroll back to how a page looked on any day it was captured.
Compare works three ways on the same pair: side by side with synced scrolling, an overlay that highlights the difference, and a word-level text redline. Light and dark themes both ship, and a comparison opens straight to a chosen view from a link. You sign in with Google, and you manage the list of tracked sites right in the page.
Paste two URLs, or choose two snapshots of one site, and see them together with the differences marked and a count of what changed.
Each tracked site is captured every night as a full-page image plus its HTML, and a new snapshot is saved whenever the page changed.
Switch the same comparison between synced side-by-side scrolling, a difference overlay, and a word-level text redline.
Ask for a fresh capture of a tracked site on demand instead of waiting for the nightly run.
Add and remove the sites you follow from the interface itself, with light and dark themes to match how you work.