Free tools for a healthier website.
No signup. Results come from our monitoring location in Frankfurt.
Is it down right now?
Enter a URL and we load it from Frankfurt, EU. You see the status code, response time and where it redirects.
SSL certificate checker
Enter a domain to see who issued the certificate, when it expires and whether browsers trust the chain.
DNS lookup
Query the DNS records of any domain: A, AAAA, MX, TXT, NS and CNAME.
HTTP header checker
See every response header a URL sends, plus a quick review of security headers.
Response time test
Five requests from Frankfurt, EU. See minimum, average and maximum response time.
Uptime calculator
How much downtime does a percentage allow? Enter a value or pick a common SLA.
Your website doesn't sleep. Now you can.
Start monitoring in minutes. Your first 10 monitors are on us.