Web Check

Web-Check is an open-source tool for gathering open data about a website or host. You enter a URL and it collects a broad range of information, presenting potential attack vectors, existing security measures, and connections within a site's architecture. Results can also help with optimizing server responses, configuring redirects, managing cookies, and fine-tuning DNS records.

Checks include IP Info, SSL Chain, DNS Records, Cookies, Crawl Rules, Headers, Quality Metrics (via Lighthouse), Server Location, Associated Hosts, Redirect Chain, Server Status, Open Ports, Traceroute, Whois Lookup, Domain Info, DNS Security Extensions, HTTP Strict Transport Security, Tech Stack, Security.txt, Email Configuration, Firewall Detection, HTTP Security Features, Archive History, Block Detection, Malware & Phishing Detection, TLS Cipher Suites, TLS Security Config, TLS Handshake Simulation, and Screenshot. Source code and self-hosting documentation are available on GitHub.

It is intended for developers, system administrators, security researchers, penetration testers, and others interested in a site's underlying technologies. The tool is licensed under MIT and is free to use, modify, and distribute for personal and commercial purposes; hosting and development can be supported through optional sponsorship.