Server Tools
35 tools available
Check the health, identity, and configuration of servers, websites, and domains. Look up records, test how a server responds, and validate its settings, so you can find problems before your users do.
Look up RDAP registration data for any domain, including registrar, registrant, nameservers, and expiry date.
Validate a domain's SPF, DKIM, and DMARC DNS records to check email authentication and spot misconfigurations.
Send HTTP requests from your browser and inspect the response, like a lightweight Postman or curl. Set the method, query parameters, headers, JSON or form body, and bearer or basic auth, then see the status, timing, headers, and formatted body. Paste a curl command to import it.
Enter a URL and the server fetches the page, extracts every JSON-LD structured data block, and checks it for JSON syntax errors, missing @context and @type, unknown schema.org types and properties, and fields Google needs for rich results.
Check whether a hostname or website is on the StevenBlack hosts blocklist, the full list with adware, malware, fake news, gambling, porn, and social media domains.
Check whether a hostname or website is blocked by HaGeZi's Multi ULTIMATE DNS blocklist, the largest tier with ads, trackers, telemetry, phishing, malware, and scams, and see which entry blocks it.
Check whether a hostname or website is blocked or targeted by EasyList, EasyPrivacy, and Fanboy's Annoyance List, and see every filter that blocks it, hides elements on it, or allows it.
See how far a website or IP address is from you on a map. The tool resolves the domain's IP addresses over DNS, geolocates each server, and shows the distance and the theoretical minimum ping from your location.
Find the autonomous system number (ASN) of any IPv4 or IPv6 address. See the AS name, the organization that runs the network, the BGP prefix the address is routed in, and the registry, country, and dates of both.
Check where a URL redirects. See every hop of the redirect chain with its status code, such as 301, 302, 307, or 308, its IP address, and its response time, and find redirect loops and the final URL. Up to 10 redirects are followed.
Find the subdomains of a domain using DNS records. The tool reads the domain's NS, MX, SOA, SRV, and SPF records and checks 350 common names like www, mail, api, and dev, then lists each subdomain with its IP addresses and CNAME target. Wildcard records are detected.