Columbus Project is an advanced subdomain discovery service with fast, powerful and easy to use API.
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Free DNS, WHOIS, DKIM discovery, SPF/DMARC analysis and blacklist checks with plain-English results, no signup.
AnalyzeID is a unified search tool for finding web pages, files, records, code, or internet intelligence.
Free and open-source domain and infrastructure research toolkit combining DNS, RDAP, WHOIS, passive subdomain discovery, IP and ASN data, email authen
Abuseipdb helps search threat intelligence, IP reputation, domains, and security investigation data.
Research paper and dataset about internet-wide scanning and host discovery from 2012.
Islegitsite helps search threat intelligence, IP reputation, domains, and security investigation data.
Security lookup platform for scanning files, hashes, URLs, IPs, and domains against threat data.
IoT search and discovery platform for finding connected devices and sensor data sources.
UUID Tools is a developer resource for coding, documentation, communities, security research, or software tools.
Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional
Collection of browser tools for hashing, encoding, encryption, conversion, and text utilities.
CentralOps collection of DNS, WHOIS, traceroute, email, and network lookup tools.
Tool for cleaning unsafe HTML and testing sanitized output for safer web content handling.
uses advanced search operators (Google Dorks) to find juicy information about target websites.
Aware Online tool for searching websites, domains, indexed pages, and related OSINT clues.
Russian-language guide for reducing online exposure and understanding counter-OSINT practices.
Guide to free and open source privacy tools, safer apps, and alternatives to data-heavy services.
Mozilla SSL is a developer resource for coding, documentation, communities, security research, or software tools.
Python package template for building command-line OSINT tools with a reusable project structure.
Anubis is a developer resource for coding, documentation, communities, security research, or software tools.
APKTool is a developer resource for coding, documentation, communities, security research, or software tools.
Att&ck is a developer resource for coding, documentation, communities, security research, or software tools.
Bazaar is a developer resource for coding, documentation, communities, security research, or software tools.