Brotli checker
Detect the compression encoding actually used in the response
Network lookup tools
Brotli checker · DNS lookup · Gravatar checker · HTTP header lookup · HTTP/2 checker · IP lookup. Choose a tool for your task below. Each tool page explains its input formats, steps and limitations.
DNS lookup
Look up DNS records for a domain
Gravatar checker
Check whether an email address has a Gravatar avatar
HTTP header lookup
Get real HTTP response headers from a public URL
HTTP/2 checker
Detect HTTP/2 support through a real TLS ALPN negotiation
IP lookup
Look up RDAP registration information for an IP
Meta tag checker
Extract the title and Meta tags from server HTML
Ping
Run a real ICMP test using the system ping command
Reverse IP lookup
Look up PTR reverse DNS for a public IP
Safe URL checker
Check HTTPS, reachability and redirects
SSL lookup
Validate TLS and inspect the server certificate
URL redirect checker
Trace a URL's redirect chain
User-agent parser
Parse browser and operating system features from User-Agent
Website hosting checker
Look up a website's resolved IP and address registry
Whois lookup
Look up domain or IP registration information via RDAP