Watchdog - Web Page Change Monitor

Web page change monitor & detector. Track any element, get instant alerts, view change history & auto-persist watchers.

Stop refreshing pages manually. Watchdog monitors any web page for changes and alerts you the moment something updates - prices, stock availability, content drops, scores, or anything else you care about. How it works: Pick any element on any website with a single click. Watchdog watches it for you and sends a desktop notification the instant it changes. No setup, no configuration, no account needed. Key Features: • Point-and-click element picker - no CSS selectors needed, just click what you want to watch • Content & Visual comparison - detect text/DOM changes or pixel-level screenshot differences • Instant detection - changes caught in real-time via DOM observation • Scheduled checks - poll at custom intervals (15s to 5min) for dynamic content • Persistent watchers - auto-restore on page load, even after browser restart • Background monitoring - check pages in hidden tabs without keeping them open • Change history - timestamped log of every detected change • Full dashboard - manage all your watchers and review changes in one place • Desktop notifications - with smart cooldowns to avoid notification spam • Multi-watcher support - track multiple elements across different pages simultaneously Use cases: → Track price drops on product pages → Monitor job boards for new listings → Watch for restocks on sold-out items → Follow live scores or election results → Detect website outages or content updates → Keep tabs on competitor pages 100% local & private. All data stays in your browser. No external servers, no analytics, no tracking, no account required. Your browsing data never leaves your machine. Open source. Watchdog is fully open source - inspect the code, contribute, or report issues on GitHub: https://github.com/Osama-Yusuf/watchdog Lightweight, fast, and built on Chrome's Manifest V3 for security and performance.