Skip to main content
Site Spy captures snapshots of your watched pages every time it checks for changes. You can view these snapshots and compare them in two ways.

​
Diff

Diff compares the two most recent snapshots of a watched page.
  1. Click the diff icon (split-screen icon) on any watch in the extension popup
  2. Site Spy triggers a fresh recheck on the server and waits a few seconds
  3. The diff view opens showing what changed between the last two snapshots
Best for: Seeing what changed since the previous check.

​
Reading the diff

  • Green highlights = content that was added
  • Red highlights = content that was removed

​
Timeline

Timeline lets you browse all historical snapshots and compare any two.
  1. Click the timeline icon (clock icon) on any watch (requires at least 2 snapshots)
  2. Browse snapshots with timestamps
  3. Select any two snapshots to compare side by side
Best for: Tracking changes over time and comparing specific points in history.
Snapshots are created each time the server checks the site. Wait for the next scheduled check or trigger a manual recheck to create more snapshots.

​
Preview

Preview shows the most recent snapshot as a rendered page, so you can see what the page looked like at the time of capture.

​
Tips

  • Use Diff for “what changed since last check” comparisons
  • Use Timeline for historical analysis across multiple snapshots
  • All content checking happens on the monitoring server for accuracy
  • Use element monitoring to ignore dynamic content like ads or timestamps