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← All 12 free tools

OSINT tool

Subdomain Finder (Certificate Transparency)

Find a domain’s subdomains from public certificate transparency logs.

Every TLS certificate is published in public logs. Searching them is a passive, lawful way to map an organization’s web presence. Results come from crt.sh and are cached for a day.

More free tools

Password Strength Checker & Generator

Test how long a password would take to crack, check it against known breaches, and generate strong passwords and passphrases.

Photo Metadata (EXIF) Viewer & Remover

See the hidden data in a photo, including its GPS location, camera and date, and download a clean copy with all metadata removed.

What Does My Browser Reveal?

See what every website learns about you the moment you visit: your IP address, approximate location, network, device and browser fingerprint.

Username Search Across 50 Platforms

Check where a username is used across 50 social networks, developer sites and communities.

DNS Lookup

Look up the A, AAAA, CNAME, MX, NS, TXT, CAA and SOA records of any domain.

Google Dork Builder

Build advanced search queries with site:, filetype:, intitle:, inurl:, exact phrases and date ranges, then run them on Google, Bing or DuckDuckGo.

Cite or link to Subdomain Finder (Certificate Transparency)

Free to share. Please link back.

LEGAL & REGULATORY NOTICE: MarieLandrySpyShop.com is an open-source intelligence (OSINT) research publication and media platform operated by Landry Industries. We publish open-access analytical research, educational frameworks, and technical tool reviews. We do not offer private investigation services, client-commissioned surveillance, or covert detective work under New Brunswick’s Private Investigators and Security Services Act (S.N.B. 2011, c. 209). Affiliate disclosure: some links on this site are affiliate links, and we may earn a commission at no extra cost to you. Learn more.