Free Online Network Tools
Free, fast, no signup. Check IP, DNS, SSL, HTTP headers and more from anywhere.
🔥 Popular Tools
🌐 IP Tools
IP Lookup
Automatically detect your public IP address, location, ISP, and ASN details....
CIDR Calculator
Calculate subnet details from an IP address and CIDR notation....
ASN Lookup
Look up ASN, organization, and country for an IP address....
🔍 DNS Tools
DNS Lookup
Query DNS A, AAAA, MX, NS, TXT, and CNAME records....
Reverse DNS Lookup
Find the hostname associated with an IP address via PTR record....
WHOIS Lookup
Domain registration info: registrar, creation and expiration dates....
DNS Leak Test
Check if your DNS queries are leaking outside your VPN tunnel....
DNSSEC Checker
Check if a domain has DNSSEC enabled and valid DNSKEY records....
🔒 Security Tools
SSL Checker
Check SSL/TLS certificate details, expiration, and security for any website....
HTTP Header Checker
View all HTTP response headers from any website....
Website Status
Check if a website is online, get HTTP status code and response time....
Latency Test
Test network latency via 3 HTTP probes to any website....
Robots.txt Checker
Fetch and view the robots.txt file from any website....
Security Headers Checker
Check security HTTP headers like CSP, HSTS, X-Frame-Options, and more....
HTTP/2 & HTTP/3 Checker
Check if a website supports HTTP/2, HTTP/3, and Alt-Svc....
301 Redirect Checker
Trace URL redirect chains hop by hop: see every HTTP status code, redirect targe...
📧 Email Tools
Email Auth Checker
Check email authentication records (SPF, DKIM, DMARC) for any domain....
Email Validator
Validate email address syntax, domain, and MX records....
📖 Port Reference
Common Ports Reference
Common network port numbers and service reference....
Port Checker
Check if a TCP port is open or closed on any host — instant results from Cloudfl...
⚖️ Compare Tools
🌐 Network Tools
Ping Test
Check if a server is reachable and measure response time via HTTP probes....
Traceroute
Trace the network path to a destination, showing each hop with IP and location d...
Website Ping & Download Test
Ping any website or IP address from global Cloudflare edge servers: check reacha...
Broadband Speed Test
Measure the full capacity of your internet connection with 8 parallel download s...