About NerdTools
NerdTools is a free, web-based toolkit designed for developers, system administrators, security professionals, and anyone who needs quick access to network diagnostics and security analysis tools.
Our goal is simple: provide fast, reliable, and easy-to-use tools that help you understand and troubleshoot domains, servers, and web infrastructure without installing any software.
Available Tools
WHOIS Lookup
DNS Lookup
SSL Check
Security Headers
Blacklist Check
SPF Check
MX Check
DMARC Check
Ping
Port Scan
IP Info
IP Reputation
SEO Analysis
Robots.txt Checker
Sitemap Checker
Why NerdTools?
- No registration required for basic scans
- Run multiple checks simultaneously with a single query
- Clean, modern interface optimized for readability
- Fast results from distributed infrastructure
- Free URL shortener with QR code generation
Privacy First
We respect your privacy. Scans are processed in real-time and we don't store or share the results of your queries with third parties. See our Privacy Policy for details.
More Information
Read our Terms of Service or get in touch if you have questions.