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Monitor specific DOM elements on web pages and get instant notifications when they change. Perfect for tracking prices, stock availability, status updates, and any dynamic content on websites. • Multiple Monitoring Rules - Set up unlimited monitoring rules for different pages and elements • Visual Element Selection - Simply click on any element to start monitoring it • 10 Notification Sounds - Choose from 10 different alert sounds to match your preference • URL Pattern Matching - Use wildcards to monitor elements across multiple pages • Real-time Detection - Instant notifications using MutationObserver technology • Smart Notifications - Desktop alerts with page title and element content • Notification History - Keep track of all detected changes • Customizable Settings - Control check intervals, sound volume, and more • Price Monitoring - Track product prices on e-commerce sites like Amazon, eBay • Stock Availability - Get notified when out-of-stock items become available • Order Tracking - Monitor shipping status and delivery updates • Social Media - Watch follower counts, likes, or engagement metrics • News Updates - Stay informed when articles or headlines change • Content Changes - Monitor any text, number, or status on any website 1. Click the extension icon in your toolbar 2. Click "要素を選択" (Select Element) button 3. Hover over and click the element you want to monitor 4. Give your rule a name (e.g., "Price Monitor") 5. Save the rule 6. Receive notifications whenever the element changes! • Uses MutationObserver API for instant change detection • Periodic checking as fallback for maximum reliability • Manifest V3 compliant • Minimal performance impact • Works on all websites • No data collection or tracking 💡 PERFECT FOR Element Alert is open source! View the code, contribute, or report issues on GitHub: https://github.com/tomohiro-owada/element-alert ⭐ Support the project by leaving a review!
Changedetection.io Website Monitor
Helps you to easily add web pages to your changedetection.io web page change detection dashboard. Changedetection.io web page change detection browser extension, makes it SUPER easy to add new web pages to monitor for changes. Simply connect it to your existing changedetection.io tool, then click "WATCH THIS WEB PAGE" to make your changedetection.io tool monitor that web page for changes. - Features easy setting of "Restock Detection" mode when you just want to know if a product comes Back-In-Stock rather than any irrelevant content changes (automatically monitors any price data) - Hover and select specific elements - Assign a new web-page watch to an existing group, so you can configure and manage notifications and other actions easily for many different watches
Site Spy
Track and monitor website changes with this web extension Know the moment any webpage changes. Site Spy monitors the sites you care about and shows you exactly what was added or removed with visual diffs. Use the extension or the web dashboard — your choice. Manage watches from the browser toolbar, or from the full dashboard at sitespy.app on any device. 🔍 Visual Diff Viewer — Side-by-side comparisons highlight every addition and removal. No more guessing what changed. 🖥️ Web Dashboard — Full dashboard at sitespy.app for managing watches, viewing diffs, and configuring notifications — works on any browser including mobile. 📸 Snapshot Timeline — Browse the complete change history of any tracked page. Compare any two versions. 🎯 Full-Page & Element Tracking — Monitor an entire page or target a specific CSS selector for precision tracking. 🏷️ Smart Tags — Organize tracked sites with color-coded tags. Filter and find what matters fast. 🌗 Dark & Light Themes — Clean interface that adapts to your preference. Two Ways to Track: • Track Current Page — One click adds whatever page you're viewing • Track Any URL — Enter any public website URL to start monitoring Great For: • Price and stock monitoring • Competitor website tracking • Documentation and changelog updates • News, blogs, and job postings • Any public webpage you want to keep an eye on Click the Site Spy icon in your toolbar Track the page you're on or enter any URL Get notified when something changes View exactly what changed with visual diffs
GrabzIt Web Monitor
Monitor changes on part of web pages or a whole web page and get informed of the changes as an email or call to a webhook. Do you have something on the web that you need to keep an eye on? With GrabzIt's Web Monitor, you can easily track website changes and automate your responses. Perfect for: - Tracking price drops for online shopping. - Getting alerted when out-of-stock items return. - Monitoring competitor website changes. - Triggering automated workflows in Zapier or Make via Webhooks. Simply select an entire webpage or just a specific element to watch. When a change is detected, get notified instantly by email, or send a call to a webhook if you want another app to handle it. Set how frequently you want to check for changes, and you are done! Once installed, follow the instructions in the extension popup to create your free GrabzIt account. This allows you to sync your monitored pages to the cloud, save your history, and access our powerful webhook integrations. Backed by GrabzIt's enterprise-grade web scraping infrastructure, you can trust your monitoring is fast and reliable.
Keyword Monitor
Monitor specific keywords on any page. Word Alert is a customizable Chrome extension that monitors any webpage in real time for keywords you choose. Once installed, it displays a sleek, draggable banner at the top of the page that tracks and shows how many times each word appears. Users can add or remove keywords directly from the banner using a simple input field, and each word's occurrences are automatically updated as you browse. You can also click on any word in the banner to highlight its presence throughout the page for easier spotting. The extension offers a case sensitivity toggle to match your preferences, and stores your keyword list until you decide to change it. Additionally, you can click the extension icon to open a lightweight control panel that lets you quickly turn Word Alert on or off—just like popular tools such as Adblock Plus. Whether you're job hunting, tracking product listings, studying, or scanning articles, Word Alert helps you stay focused on the words that matter most to you.
