HTTP probing toolkit that checks which hosts are live and grabs titles, status codes, tech stack, TLS details and favicon hashes in bulk.
tools / wappalyzer
Wappalyzer
Browser extension and lookup service that identifies technologies on websites, such as frameworks, CMS, analytics, CDNs and e-commerce platforms.
opsec warning
This tool is active: it interacts directly with the target's infrastructure or may otherwise reveal your interest to the target. Use a research environment and weigh the risk before running it.
similar tools
Technology profiler for websites that shows the CMS, analytics, ad networks and hosting, plus a relationship tool linking sites by shared tracking IDs.
Cyberspace mapping search engine with rich fingerprinting (icon hash, cert, header, body). Strong coverage of Asian and Chinese hosts.
Headless-Chrome screenshot tool for large lists of URLs, with a local web UI to triage results and track changes.
Hosting history, netblock owner, nameserver, SSL and technology report for any site. Netcraft has tracked hosting since the 1990s.
Sandbox that loads a URL and records the requests, IPs, domains, screenshots and DOM. Its search across millions of past scans is a pivot goldmine.