Quick, free, browser-based utilities for anyone working with proxies, VPNs, or network privacy.
See your public IP address and approximate location instantly.
Look up the city, region, country and ISP behind any IP address.
Check whether an IP address is flagged as a known proxy, VPN, or hosting range.
Check for WebRTC IP leaks, tracking protections, and fingerprinting exposure.
Decode your browser, OS, and device details from your User-Agent string.
Check A, AAAA, MX, TXT, NS, and CNAME records for any domain.
Calculate network address, broadcast address, and usable host range for any CIDR block.
Check whether a specific TCP port on a host is open, closed, or unreachable.
Find out if your Jio, Airtel or other ISP connection is behind CGNAT - the usual reason port forwarding fails.
Check domain registration details - registrar, dates, nameservers, and status.
Check a site from our server and your browser to see if it's actually down or just blocked for you.
Measure your connection's round-trip time to multiple global regions, right from your browser.
Check which security headers a website sends, plus view the full raw response headers.
Check whether an IP or domain is listed on common spam blocklists like Barracuda and SpamCop.
Check a domain's email authentication setup, with plain-English explanations of each result.
Find which DNS-over-HTTPS provider responds fastest from your network, for Secure DNS setup.
Trace a URL's full redirect chain, hop by hop, and spot loops or too-many-redirects errors.