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SSL for Free is a developer resource for coding, documentation, communities, security research, or software tools.

Online service for detailed and free analysis of suspicious files and URLs.

CentralOps collection of DNS, WHOIS, traceroute, email, and network lookup tools.

Filescanio is a code project with source, releases, documentation, or setup notes.

Filescan Itsec is a privacy tool for blocking ads, trackers, popups, proxies, or unwanted web behavior.

Filescan.io is a privacy tool for blocking ads, trackers, popups, proxies, or unwanted web behavior.

Guide to free and open source privacy tools, safer apps, and alternatives to data-heavy services.

Maps who links to any domain using the open Common Crawl hyperlink graph. Free, no-signup referring-domain and competitor link-footprint lookups for d

Free and open-source domain and infrastructure research toolkit combining DNS, RDAP, WHOIS, passive subdomain discovery, IP and ASN data, email authen

Free DNS, WHOIS, DKIM discovery, SPF/DMARC analysis and blacklist checks with plain-English results, no signup.

Free, no-login IP reputation lookup that aggregates up to 8 risk sources, flags residential vs datacenter, and profiles /24 C-block neighbors. Also of

Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional

is a website that gives you a free and comprehensive report about a specific website.

Tool for turning text into image files for sharing, testing, or simple visual output.

ANY.RUN sandbox for interactive malware analysis, behavior monitoring, and file investigation.

Online checksum tool for calculating hashes from text or files for verification and security checks.

Community threat intelligence platform for indicators, pulses, malware, and attack research.

Fortinet threat intelligence portal for security updates, IP reputation, malware, and web filtering data.

Open source threat intelligence platform for analyzing observables, files, and security indicators.

Python OSINT crawler for extracting URLs, files, endpoints, and related website data.

Cloud messaging app for chats, channels, groups, calls, bots, and file sharing.

Malware research archive with papers, samples, writeups, and historical security material.

AnalyzeID is a unified search tool for finding web pages, files, records, code, or internet intelligence.

Binary Ninja supports reverse engineering, malware analysis, file inspection, or security research workflows.