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Free tools that can be used without creating an account.
Ahmia
Search engine for Tor hidden services (.onion), excluding abuse material.
AlienVault OTX
Open Threat Exchange sharing community indicators of compromise.
Bellingcat Online Investigation Toolkit
Curated, maintained directory of open-source investigation tools.
BreachDirectory
BreachDirectory is a free breach-search tool for OSINT investigations: enter an email address or username to check whether it appears in known public data breaches, so you can spot exposed accounts and know which passwords to rotate.
Companies House
UK government register for searching company filings, officers and persons with significant control.
CyberChef
GCHQ's browser-based "Cyber Swiss Army Knife" for decoding, decrypting, transforming and analysing data.
DNSDumpster
Free domain research tool that maps a domain's subdomains and hosts.
FastPeopleSearch
Free US people lookup by name, phone or address.
Forensically
Free in-browser image-forensics toolkit (error-level analysis, clone detection, noise analysis, metadata) that never uploads your images.
FotoForensics
Online error-level analysis and metadata inspection to detect edited images.
Google Earth
Google Earth is not a live satellite feed — its imagery is periodically updated historical and aerial photography, not real-time video. For OSINT work it still offers a global historical-imagery timeline, 3D terrain views, distance and area measurement tools, and KML/KMZ support for mapping and geolocation research.
Google Hacking Database
Exploit-DB's curated archive of Google search queries ("dorks") that surface exposed data.
Google Lens
Google's visual search to identify objects, places and text in images.
Have I Been Pwned
Checks emails/accounts against known breaches.
ICIJ Offshore Leaks Database
ICIJ's searchable database of offshore entities and officers from the Panama, Paradise and Pandora Papers and other leaks.
InVID WeVerify
Browser plugin for verifying and analyzing images and videos found on social media.
Jimpl
Online EXIF viewer showing a photo's hidden camera, GPS and timestamp data.
LittleSis
Free database mapping relationships between powerful people and organizations.
NASA FIRMS
NASA's Fire Information for Resource Management System, mapping near-real-time satellite fire and thermal-anomaly detections.
OSINT Framework
Web directory categorizing hundreds of OSINT tools and data sources.
OSINT.SH
All-in-one web toolkit: DNS history, reverse IP, WHOIS.
OpenStreetMap
Free, editable world map with rich open geographic data.
Overpass Turbo
Query and visualize OpenStreetMap data by feature and area.
SEC EDGAR Full-Text Search
Full-text search across SEC filings back to 2001 by company, filer name, form type and keyword.
SunCalc
Shows sun position and shadow direction for any place and time, used to verify photo timing.
Telegago
Google Custom Search engine scoped to indexed Telegram channel content.
ThatsThem
Free people search aggregating names, addresses, emails and phone numbers.
Tor Browser
Privacy-focused browser that routes traffic through the Tor network and can open .onion hidden services.
TruePeopleSearch
Free US people search returning addresses, phone numbers and relatives.
ViewDNS.info
Collection of free DNS, WHOIS, reverse-IP and network lookup tools.
Wayback Machine
Internet Archive's index of historical snapshots of web pages.
Yandex Images
Reverse image search noted for strong face and location matching.
archive.today
Web archiving service that saves and serves permanent snapshots of pages on demand.
crt.sh
Searches Certificate Transparency logs to enumerate a domain's certificates and subdomains.
grep.app
Search engine for source code across public GitHub repositories.