changedetection.io
Watches web pages for you on a schedule and sends an alert when the price, the stock or the words change, with filters so only the part you care about counts.
What you can do with it
- Price-drop alerts below a price you set
- Back-in-stock alerts for sold-out products
- Know when a council, job or ticket page is updated
Worth knowingThe basic setup reads pages without running JavaScript, so some big shops need its Chrome mode (extra setup) or won't work. It only checks while it's running on your PC. With uv, install with --prerelease=allow or you get an old version that crashes.
The full tutorial
01Install changedetection.ioFREE02Start it and open the dashboardMEMBERS03Set your first price-drop alertMEMBERS04Get the alert on your phoneMEMBERS05Watch any page, and only the part you care aboutMEMBERS06Recipe: a back-in-stock alert for something that sells outMEMBERS07Point it at real pages, politelyMEMBERS
Get an alert the moment a price drops or a web page changes · ~36 min · tested 2026-10-09
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