What this checks
- Up or down: we fetch the URL once from Cloudflare's network, follow up to 5 redirects, and report the HTTP status and response time.
- Readable text: we strip scripts and styles and count the words left. That's what a text-change monitor compares.
- JavaScript-rendered pages: if the HTML is an empty app shell, we say so, because a change monitor that doesn't run a browser (ours doesn't) can't see that content.
- Noisy content: relative times and live counters can trigger an alert on every check.
- Fingerprint: a hash of the normalized text. Same fingerprint later means no text change.
Only public http(s) URLs are checked; private and internal addresses are refused. We don't save the URLs you check to our database. Limited to a few checks per minute per network.
Want to know how to watch a page without writing a scraper? Read our guide.