PagePulse — Website Change Monitor

PagePulse is a free website change monitor that tracks webpage elements for text changes and alerts you when something changes. Private by default, powerful when you want it, no account needed. HOW IT WORKS 1. Click the PagePulse icon on any page 2. Select the element you want to track 3. Choose how often to check (5 minutes to 24 hours) 4. Get a notification when something changes 5. View exactly what changed with smart summaries and diffs SMART CHANGE DETECTION - Smart summaries for list pages — shows "3 new items, 2 removed" instead of a wall of text - Keyword filters — only get notified when changes match your interests - Ignore patterns — filter out timestamps, point counts, and other noise with one click - Digest mode — batch notifications into hourly summaries instead of constant alerts - JS Rendered mode — monitor single-page apps, React sites, and dynamic websites - Selector auto-recovery — when a site updates its DOM, PagePulse uses text fingerprint matching to find your element again instead of silently breaking - Monitor health dashboard — always know if your monitors are running GREAT FOR - Price drop alerts and restock notifications on any online store - Job posting alerts on career pages and job boards - Competitor monitoring and content change detection - Government and regulatory update tracking - API documentation and changelog monitoring - News tracking for specific topics on any news site OPTIONAL POWER FEATURES (off by default, fully opt-in) - Webhook actions — fire a JSON POST to Slack, Discord, Zapier, IFTTT, n8n, or any URL on every detected change. No PagePulse middleman. - AI change summaries — bring your own API key from any major LLM provider you already use, including free-tier options. One-line plain-English explanations of what actually changed. Configurable global and per-monitor instructions. - Cross-device sync — opt in to replicate monitor configs across your signed-in Chrome profile via Chrome's built-in encrypted sync. Page content and history stay local on each device. MORE FEATURES - Dark and light themes - CSV, JSON, and RSS feed export with full change history - Keyboard shortcuts for power users - Copy diffs to clipboard for sharing - Share monitor configurations with teammates via link - Right-click context menu to start monitoring directly - Pause and resume with clear status indicators - Notification sound alerts with on/off toggle - Inline rename, unread badges, and a compact in-app stats footer - First-run onboarding to walk you through your first monitor PRIVACY Local-first by default. All baseline functionality runs entirely in your browser — PagePulse has no server. No accounts. Page URLs, page content, and selectors never leave your device. Host access is requested per-site only when you create a monitor. Anonymous usage statistics (feature counts and reliability signals only, keyed to a random ID — never your browsing data) help us improve PagePulse; turn them off any time in the dashboard footer. The three optional power features above transmit data only to destinations you choose: Chrome's built-in encrypted Sync, the LLM provider you select with your own API key, and webhook URLs you paste. PagePulse never proxies, intercepts, or stores any of that traffic. Each feature is off until you turn it on. FREE 10 monitors, 5-minute checks, 30-day history. All features included. No hidden limits. Works with static and server-rendered pages out of the box. Use JS Rendered mode for single-page apps and dynamic websites. Sites that aggressively block iframe embedding (e.g., Twitter/X, LinkedIn) cannot be reliably background-monitored — PagePulse will tell you so via the "Monitor needs attention" notification rather than silently failing.