Web Change Alert monitors selected parts of webpages and sends a browser notification only when the value actually changes.
Chrome Web Store: Web Change Alert
- Select text, images, SVG, canvas, or attributes directly from a page
- Choose from nearby/nested target candidates when several values overlap
- Schedule automatic checks by interval, daily, weekly, or monthly time
- Add optional filters so alerts fire only when text contains, disappears, or matches a pattern
- Copy an Agent AI prompt for Codex, Claude Code, OpenClaw, Antigravity, and similar browser-controlling agents
- Save site title and favicon for easier monitor scanning
- Run a monitor manually at any time
- Re-select the target quickly when collection fails
- Track multiple sites at once
- Login-required sites need an active signed-in session
- Sites protected by anti-bot systems may require manual verification
- Very short intervals can cause rate limiting or blocking from the target site