NerdTools Fast, free online tools for sysadmins, developers, and nerds.

Scan any domain or IP in seconds.

Run WHOIS, DNS, SSL, security headers, blacklist checks, and more from a single interface. No registration required.

Hide results ? When enabled, this scan will not appear in the most recent searches or the scan leaderboard.

Scan leaderboard

Most searched domains and IPs.

  1. #1 google.com 136 scans
  2. #2 nerdtools.co.uk 54 scans
  3. #3 8.8.8.8 37 scans
  4. #4 prosys.net 25 scans
  5. #5 tcpcheck.com 24 scans

Most recent scans

Latest searches across the toolset.

  1. #1 fourweeks.net Feb 4, 21:06
  2. #2 homeservice.ee Feb 4, 21:06
  3. #3 karelvuks.ee Feb 4, 21:06
  4. #4 nordsydost.se Feb 4, 21:05
  5. #5 6030.co.uk Feb 4, 21:03

Why NerdTools?

Everything in one place

Stop juggling browser tabs. Run WHOIS, DNS, SSL, security headers, blacklist checks, and more from a single page.

Built for speed

Results load fast. No sign-up walls, no waiting around. Just enter a domain and go.

Free to use

Core scans are completely free. Create an account to unlock uptime monitoring, screenshot tracking, and saved reports.