Domain Tools

Domain analysis tools for WHOIS lookup, DNS records, SSL checking, and website diagnostics.

25 free tools available

Free WHOIS Lookup Tool

Look up domain registration information and ownership details. Free, fast, and works entirely in your browser with no sign-up required.

Free DNS Lookup Tool

Query DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA). Free, fast, and works entirely in your browser with no sign-up required.

Free Domain Age Checker

Find out how old a domain is and when it was first registered. Free, fast, and works entirely in your browser with no sign-up required.

Free SSL Certificate Checker

Verify SSL certificates, check expiration dates, and review certificate chain details. Free, fast, and works entirely in your browser with no sign-up required.

Free Domain Availability Checker

Check if a domain name is available for registration. Free, fast, and works entirely in your browser with no sign-up required.

Free Redirect Checker Tool

Trace URL redirects, analyze full redirect chains, and identify status codes at each hop. Free, fast, and works entirely in your browser with no sign-up required.

Free Domain to IP Lookup

Resolve any domain name to its corresponding IP address with DNS lookup details. Free, fast, and works entirely in your browser with no sign-up required.

Free IP to Domain Lookup

Reverse DNS lookup - find domain names for an IP address. Free, fast, and works entirely in your browser with no sign-up required.

Free HTTP Headers Checker

View and analyze HTTP response headers from any URL for debugging and SEO audits. Free, fast, and works entirely in your browser with no sign-up required.

Free Link Extractor Online

Extract all internal and external links from any webpage URL for SEO analysis. Free, fast, and works entirely in your browser with no sign-up required.

Free Website Status Checker

Check if any website is currently up or down and view server response details. Free, fast, and works entirely in your browser with no sign-up required.

Free Favicon Grabber Tool

Download and extract the favicon icon from any website URL in multiple sizes. Free, fast, and works entirely in your browser with no sign-up required.

Free MX Record Lookup

Look up MX (Mail Exchange) records for any domain. View mail servers and their priority values. Free, fast, and works entirely in your browser with no sign-up required.

Free NS Record Lookup

Look up nameserver (NS) records for any domain. Identify your DNS provider instantly. Free, fast, and works entirely in your browser with no sign-up required.

Free Reverse DNS Lookup

Convert an IP address to a hostname using PTR record lookup. Identify who owns an IP address. Free, fast, and works entirely in your browser with no sign-up required.

Free Bulk HTTP Status Checker

Check HTTP status codes for multiple URLs at once. Identify broken links, redirects, and errors. Free, fast, and works entirely in your browser with no sign-up required.

Free Domain Name Suggestion Tool

Generate creative domain name ideas from your keywords and check availability across multiple TLDs. Free, fast, and works entirely in your browser with no sign-up required.

Free DMARC Record Checker

Check and parse DMARC records for any domain. Validate your email authentication policy. Free, fast, and works entirely in your browser with no sign-up required.

Free SPF Record Checker

Validate and parse SPF records for any domain. Ensure your email sending policy is correctly configured. Free, fast, and works entirely in your browser with no sign-up required.

Free DKIM Record Checker

Look up and validate DKIM records for any domain and selector. Verify your email signing keys. Free, fast, and works entirely in your browser with no sign-up required.

Free DNS Propagation Checker

Check DNS propagation across multiple global resolvers. See if your DNS changes have propagated worldwide. Free, fast, and works entirely in your browser with no sign-up required.

DNS Health Checker

Run 8 DNS health checks on any domain using DNS-over-HTTPS. Verify A, AAAA, MX, NS, TXT (SPF/DMARC), SOA, CAA, and CNAME records instantly.

Subdomain Finder

Check 24 common subdomains using DNS-over-HTTPS. Find active subdomains for any domain — useful for SEO site structure analysis and security audits.

IP Geolocation Lookup

Look up geolocation for any IP address or domain. View country, region, city, ISP, timezone, and coordinates. Detect your own public IP address instantly.

Domain Age Checker

Check domain age and registration history for any website. Free, fast, and works entirely in your browser with no sign-up required.

Guides & tutorials

Step-by-step guides to get the most out of these tools.

How to Do a WHOIS and DNS Lookup for a Domain How to Check a Website's SSL Certificate

About Domain Tools

The Domain Tools help you investigate and diagnose any website or domain. Run WHOIS lookups, inspect DNS records, check SSL certificates and expiry, trace redirects, and review HTTP headers — useful checks for buying domains, debugging email, or auditing a site's setup.

They're built for site owners, IT admins, and SEOs. Combine them with our Website Tools for performance and accessibility audits, our SEO Tools for on-page optimization, and our Security Tools to harden your configuration.

Related categories

Website Tools SEO Tools Security Tools