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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
Free lookup to see if an email or username appears in public breaches.
DNSDumpster
Free domain research tool that maps a domain's subdomains and hosts.
FastPeopleSearch
Free US people lookup by name, phone or address.
FotoForensics
Online error-level analysis and metadata inspection to detect edited images.
Google Earth
Satellite imagery and 3D globe for exploring and measuring locations.
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.
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.
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.
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.
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.