Screenshot Capture
Capture full-page screenshots alongside text monitoring
Screenshot capture is a Pro plan feature that saves a PNG screenshot alongside each text snapshot when a watch checks a page. This gives you both text diffs and visual comparisons.
Enabling screenshots
- Open the watches list
- Click the gear icon on a watch to open Watch Settings
- Toggle Screenshot Capture on
- The watch automatically rechecks to capture its first screenshot
When enabled, the watch uses a browser-based fetcher so it can render the page and take a screenshot.
Screenshot capture requires the Pro plan. Free and Starter users see an upgrade prompt.
Viewing screenshots
Preview page
The preview page shows a Text / Screenshot tab toggle when screenshots are available. Switch to the Screenshot tab to see the most recent capture.
Diff page
The diff page shows a Text Diff / Visual Diff tab toggle. The visual diff view offers two modes:
- Before / After — A slider to compare the two screenshots side by side
- Diff Overlay — A generated image highlighting changed regions in red
The change percentage and sensitivity threshold are shown below the image when available.
How it works
- Screenshots are additive — text monitoring always runs, screenshots are captured alongside
- Each check saves both a text snapshot and a screenshot (if enabled)
- At least 2 screenshots are needed before visual comparison is available
- The diff overlay is generated on-demand using image comparison (SSIM)