DiffSpot — Web Page Change Monitor

Monitor any web page for changes. Get notified when prices drop, content updates, or items restock. Free to start.

DiffSpot monitors web pages for changes and notifies you instantly — all running locally in your browser. WHAT IT DOES • Track any web page for text changes — prices, stock status, news, job postings, and more • Visual element picker — click on the exact part of a page you want to monitor • Smart diff detection — see exactly what changed with highlighted additions and deletions • Keyword filters — only get notified when specific words appear or disappear • Exclude noisy sections — ignore ads, timestamps, and dynamic content WHY DIFFSPOT? Unlike other page monitors, DiffSpot's free plan runs entirely in your browser using Chrome's Offscreen API — no tabs opening in the background. • Zero tab pollution — pages are fetched silently without opening tabs • Free plan is 100% local — your data stays in your browser, no sign-up needed • Clean diff view — see additions (green) and deletions (red) at a glance • Upgrade anytime for cloud-based monitoring with email, Slack, Discord & more FREE PLAN • Up to 10 monitored pages • 12-hour check intervals • Browser notifications • 5 change records per page • No sign-up required PRO PLAN — $8/month • Up to 50 monitored pages • Check intervals down to 5 seconds • Cloud-based monitoring (works even when browser is closed) • Email, Slack, Discord, Webhook, LINE notifications • 30 change records per page BUSINESS PLAN — $15/month • Up to 200 monitored pages • All Pro features included • 100 change records per page • Priority support PERFECT FOR • Price tracking — know when products drop in price • Stock monitoring — get alerted when sold-out items return • Job boards — never miss a new posting • News & research — track updates on topics you follow • Competitor monitoring — watch for changes on competitor pages Get started in 3 clicks: Install → Enter URL → Start Monitoring.