Free tools
HOSTING &
DOMAIN TOOLS
Fast, free utilities for anyone running a website. Check DNS, SSL, who a site is hosted with, WHOIS, redirects and email blacklists, then find a better host with the data behind every result. No signup.
DNS Checker
Look up A, AAAA, MX, TXT, NS, CNAME and SOA records for any domain, plus who runs its nameservers.
SSL Checker
Inspect any site’s SSL certificate: issuer, expiry, covered domains and whether the chain is valid and trusted.
Hosting Checker
Find out who hosts any website. We resolve the domain to its provider and link straight to its HostList profile and better-rated alternatives.
WHOIS Lookup
Look up a domain’s registrar, registration and expiry dates, age, status and nameservers from live registry data.
Redirect Checker
Trace the full redirect path of any URL, hop by hop, with the status code at each step so you can spot chains and loops.
Blacklist Checker
Check whether a domain’s IP is listed on major email and spam blacklists that can silently block your mail and traffic.
MX Record Lookup
See the mail servers behind any domain in priority order, with SPF and DMARC checks that decide whether email lands.
Domain Age Checker
Find out exactly when any domain was first registered, its precise age, expiry date and registrar from live registry data.
DNS Propagation Checker
Query resolvers around the world (Google, Cloudflare, Quad9 and more) to see whether your DNS changes have gone live.
HTTP Header Checker
Inspect any URL’s response headers and status code, with a security-header audit covering HSTS, CSP and more.
DMARC Checker
Look up a domain’s DMARC record, read its policy, and see whether it actually protects the domain from spoofing.
SPF Checker
Look up a domain’s SPF record, list the servers it authorises, and catch the errors that break email delivery.
DKIM Checker
Find a domain’s published DKIM keys by probing the common selectors, so you can confirm mail is signed.
Website Down Checker
Check whether a website is down for everyone or just you, with the live status code and response time.
IP Address Lookup
Look up any IP address or domain: location, ISP, network and the hosting provider that owns it.
Password Generator
Generate strong, random passwords in your browser. Nothing is sent anywhere, ever.
Website Speed Test
Measure any site’s real load performance: Core Web Vitals, a performance score, and where the time goes.
CMS Detector
Find out what CMS and technology a website runs on: WordPress, Shopify, Wix, and the stack behind it.
Email Header Analyzer
Paste raw email headers to trace the delivery path, timing, and SPF, DKIM and DMARC authentication results.
Reverse IP Lookup
Find other domains hosted on the same IP address, a quick way to spot shared hosting neighbours.
Business Name Generator
Generate brandable business names, then screen each for trademark risk and live domain availability before you commit.