What it is
Sherlock is a command-line tool for searching accounts by username across many websites and social platforms. The user enters a name, and Sherlock checks services where a matching account may exist.
The project belongs to OSINT: working with open sources. It is useful for security researchers, journalists, investigators, digital footprint checks, and people who want to inspect their own presence online.
What is inside
The repository contains Python code for site checks, the list of supported services, the CLI, and installation/usage documentation. Official materials cover `pipx`, `pip`, `uv`, Docker, and some system package managers.
A typical flow is to install Sherlock, run a search for one or more usernames, receive possible matches, and manually verify results. Manual verification matters because sites change and false positives can happen.
Username search
This command shows the basic scenario: check one username across many services.
sherlock example_userStrengths
The strength is scaling a repetitive check. Instead of manually opening dozens of sites, Sherlock quickly produces a first list of possible traces.
Limits
The limitation is ethics and accuracy. Sherlock must be used legally and responsibly. A username does not prove identity, sites change behavior, and matches require confirmation. The tool finds traces; it does not make conclusions for the user.