Free Network Tools

Diagnose and inspect DNS records, SSL certificates, HTTP headers, and more. No account required.

DNS Lookup

Look up DNS records for any domain. Supports A, AAAA, MX, CNAME, TXT, and NS record types.

Query WHOIS data for any domain. View registrar, expiry dates, nameservers, and raw WHOIS records.

Check SSL certificate details including issuer, validity, SANs, fingerprint, and chain status.

Inspect HTTP response headers for any URL. View status codes and all header key-value pairs.

Check if a host is reachable and measure response time. Supports custom port numbers.

Get geolocation, ISP, ASN, and reverse DNS information for any IP address.

Analyze meta tags, Open Graph tags, and SEO elements for any URL.

Verify whether a server supports the HTTP/2 protocol and view the negotiated protocol.

Trace the full redirect chain for any URL and see every hop with status codes.

Find all domains hosted on an IP address. Useful for shared hosting investigation.

Check if a URL is cached by Google and get a direct link to the cached version.

Identify the hosting provider, ISP, and organization behind any domain.

Check if a server supports Brotli or Gzip compression and view the encoding.

Trace the network path to any host. View each hop with IP, hostname, and response time.

Scan open ports on any host. Supports custom port ranges and identifies common services.

Calculate network address, broadcast, subnet mask, and usable host range from CIDR notation.

Encode text to Base64 or decode Base64 strings. Runs entirely in your browser.

Decode and inspect JWT tokens. View header, payload, and expiry. Runs in your browser.

Complete reference of HTTP status codes with descriptions and search functionality.

Set up automated uptime, SSL, and domain monitoring with instant alerts.