DiffSpot — Web Page Change Monitor

About

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.