What does an uptime checker do?
An uptime checker requests a website and reports whether it's currently reachable, the HTTP status it returns and how long the response took. SiteGuard Monitor's checker confirms a site is up or down right now and runs a full passive scan covering SSL, DNS, email security and headers, combined into one explainable 0-100 risk score.
Is the site actually down, or is it just you? This free uptime checker tells you whether a website is reachable right now and how fast it responds, then runs a full scan so you see availability alongside everything else.
Why surprise downtime is so costly
Most outages are discovered by a customer or client, not the person responsible for the site. By the time the call comes in, you're reacting under pressure with no idea how long it's been down or why.
- Downtime usually surfaces as an angry client message
- Without monitoring you can't tell how long a site's been down
- Slow responses signal trouble before a full outage
What this uptime checker shows
- Whether the site is reachable right now
- The HTTP status code returned
- Response time for the request
- Whether it responds over HTTP and HTTPS
Availability in context
A site being up is just the start. This tool runs a full free scan, so availability appears next to the SSL certificate, DNS records, email security and security headers — combined into one 0-100 risk score that shows the bigger picture.
From a spot check to always-on monitoring
A one-time check only tells you about right now. Add a domain to SiteGuard Monitor and it checks availability around the clock, alerting you by email and Discord the moment a site goes down — and feeding uptime into branded client reports and public status pages.
- 24/7 uptime monitoring across every client site
- Instant email and Discord downtime alerts
- Uptime in monthly reports and public status pages
Passive and non-intrusive
An uptime check is a single read-only request — the same as a browser loading the page. SiteGuard runs no load or stress testing; it just observes whether the site responds and how quickly.