Network & Security Tools
Tools in This Collection
IP Address Lookup
Look up your public IP address and geolocation data using free public APIs.
DNS Lookup
Look up DNS records for any domain. Query A, AAAA, MX, TXT, NS, and CNAME records.
HTTP Header Checker
Inspect HTTP response headers for any URL. Check security headers, caching, and server configuration.
SSL Certificate Checker
Check if a website has a valid SSL/TLS certificate and if HTTPS is properly configured.
Port Checker
Reference guide for common network ports with typical services and security notes.
Favicon Checker
Check if a website has a favicon and preview it. Tests common favicon paths.
Website Speed Estimator
Estimate page load time based on file sizes and connection speed. Optimize your web performance.
Frequently Asked Questions
- How do I check if my SSL certificate is properly configured?
- Enter your domain in our SSL checker to verify certificate validity, expiration date, issuer, certificate chain completeness, and supported cipher suites. It flags common issues like expired certificates, missing intermediates, and weak encryption.
- What DNS records should I check for my domain?
- At minimum, verify your A record (points to your server IP), CNAME records (aliases), MX records (email routing), and TXT records (SPF/DKIM for email authentication). Our DNS lookup tool retrieves all record types for any domain.
- Why should I check HTTP response headers?
- HTTP headers control caching, security policies, CORS, and content types. Missing security headers like Content-Security-Policy or Strict-Transport-Security leave your site vulnerable. Our header checker shows all response headers and flags missing security headers.