Osint Resources, WEB OSINT

Open-source tool for concurrent crawling of websites and their internal links to collect email addresses. https://github.com/rix4uni/emailextractor

Online tool for reconnaissance and attack surface mapping. Quickly enter any domain to discover its associated subdomains https://yup.gr/tools/subdomain-finder

Web analysis tool for OSINT. Enter any URL to get a deep-dive analysis, revealing vital information such as HTTP headers, SSL certificate details, meta tags, tracking codes, external resources, and website location. https://meta.narka.io

Famous Online vulnerability scanner designed to swiftly assess the security of web servers. It identifies potential vulnerabilities, misconfigurations, and outdated software, all from an intuitive, web-based interface. https://nikto.online/

Security Intelligence Platform A powerful tool to discover security vulnerabilities, exposed credentials, configuration files, and database backups before attackers do. Uses pay-per-search pricing and advanced regex patterns for precise vulnerability discovery. https://cerast-intelligence.com/

Search which websites use specific SaaS technologies or HTML/JS snippets — ideal for tech footprinting, competitor intel, and large-scale site discovery (Shopify, HubSpot, Stripe, etc.). https://www.nerdydata.com/

Website profiler that reveals the tech stack behind any domain. Identify CMS, analytics, hosting, frameworks, and more — useful for OSINT, pentesting prep, and market intelligence. https://builtwith.com/

Tool to check domain ownership history. Access WHOIS records across 25B+ entries via lookup, API, or database download — useful for investigations, attribution, and threat research. https://whois-history.whoisxmlapi.com/

Monitors and visualizes Torrent activity by IP and some other stats https://iknowwhatyoudownload.com/

Visualize the questions, queries, and phrases people use on search engines around any topic. Great for content research, SEO, and understanding public interest. https://answerthepublic.com/