Tools
Every tool, in one place
Free lookups for any domain. Start with a full report if you want the whole picture, or go straight to the single question you came with — everything here runs on the same engine.
Full reports
CMS & technology
CMS Version & Extension Checker
Identify which version of WordPress or Joomla a site runs, along with the plugins, components, modules and theme its pages load. Passive only: this reads the public page source and a fixed list of files the CMS itself publishes — nothing is guessed, probed for or changed.
WordPress Detector
Check whether a website is built with WordPress (or another CMS / framework) by inspecting its response headers and markup.
Technology Stack Checker
Detect the technology behind a website: CMS or framework, web server, CDN and powered-by signals — all from one request.
CDN Checker
Detect whether a website is served through a CDN or WAF such as Cloudflare, Fastly, Akamai, BunnyCDN, KeyCDN or Vercel.
DNS & domain
DNS Lookup
Look up the DNS records of any domain: IPv4 (A), IPv6 (AAAA), nameservers (NS) and mail servers (MX). Resolved against authoritative resolvers and cached for one hour.
Nameserver Checker
Find the authoritative nameservers (NS records) of any domain — often the quickest way to tell which DNS or hosting provider runs it.
WHOIS Lookup
Look up domain registration data via RDAP/WHOIS: registrar, creation/expiry/updated dates and domain status.
Reverse IP Lookup
Resolve a domain to its IP, then find other domains hosted on the same address. Useful for spotting shared hosting and site networks.
Security & transport
SSL Certificate Checker
Inspect a site's TLS certificate: issuer, validity window, TLS version and the domains it covers (SANs).
HTTP Header Checker
See the HTTP response headers a website returns: status, server software, X-Powered-By, HTTP version and more.
Every tool reads only what a website publishes to any visitor. Nothing here logs into anything, guesses at file paths or changes a thing on the site being checked.