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Free OSINT tools

The open-source tools investigators already use, running in your browser. Pick the input you have and start with the tool that fits it.

What you enter is sent in the request body, never in a URL, and never logged. Results are cached for a few hours under a one-way hash, then expire.

Username search

Find where a handle has an account. Same question, different site lists and rules.

Sherlock online
The classic username checker: 425+ sites, one handle.

Username · MIT

Maigret online
Sherlock's bigger cousin: 500+ top sites with category tags.

Username · MIT

WhatsMyName username search
650+ sites, two conditions per check, very few false positives.

Username · CC BY-SA 4.0

Blackbird OSINT online
Username search on the WhatsMyName list, plus email registration checks.

Username · Email · CC BY-NC-SA 4.0

user-scanner online
Thousands of hand-written checks for usernames and emails.

Username · Email · MIT

Email lookup

Find which services an email address is registered on.

Holehe online
Which sites an email is registered on, from 100+ signup and login checks.

Email · GPL-3.0

Phone number lookup

Read a number's country, type, and formats, then search its footprint.

PhoneInfoga online
Country, type, and formats for any number, plus footprint search links.

Phone · GPL-3.0

Domain lookup

Registration data, dates, and contacts for a domain.

WHOIS lookup
Registrar, dates, age, and nameservers from the registry.

Domain · Public registry data

Infostealer exposure

Check whether credentials tied to an identity were stolen by malware.

Infostealer check
Infostealer infections tied to an email, username, or domain.

Email · Username · Domain · Free API, attribution required

FAQ

Free OSINT tools, answered

Are these the real open-source tools?

Holehe and user-scanner run unmodified in isolated containers. Sherlock, Maigret, WhatsMyName, and Blackbird run their own site lists and detection rules on a lightweight engine built for the browser. PhoneInfoga's keyless scanners are rebuilt on the same phone library it uses. Every page names the project, its licence, and its authors.

Do I need an account?

No. Every tool here works without signing in. Each tool limits how many searches one network can run per minute so the servers stay usable for everyone.

Which username tool should I use?

WhatsMyName for precision, Sherlock for a fast first pass, Maigret for coverage, and user-scanner for the widest sweep, which takes longer. Blackbird runs the WhatsMyName list and also checks emails.

What do the free tools not do?

They tell you that an account or record exists. They do not tell you who is behind it, and they do not search breach databases or commercial people-search data. That is what SearchIn's paid lookups are for.

Can I use these for any investigation?

Use them only on people and organisations you are authorised to investigate, and follow the laws and site terms that apply to you. Account existence is personal data in many places.

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