WhatsMyName

WhatsMyName (WMN) is a community-maintained dataset that lets you find out if a username exists across hundreds of websites. If you're investigating a person of interest, verifying an online identity, or simply curious about your own digital footprint, this project powers the tools that make that possible.

Created in 2015 by Micah "WebBreacher" Hoffman, WhatsMyName started as a personal fix for a real frustration: existing username checkers were full of false positives. Over the years, contributions from people all over the world have grown it into one of the most widely-used username enumeration datasets in the OSINT community.

Table of Contents

• Just want to search a username right now?
• How It Works
• Tools and Sites That Use WhatsMyName
• Help Keep WMN Accurate
• Stay Connected
• License

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Just want to search a username right now?

Head to whatsmyname.app -- a free, browser-based tool built directly on this dataset. No installation required.

Or check out the many tools below that use WMN.

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How It Works

WMN is a single, carefully maintained JSON file (wmn-data.json). Each entry describes how to check one website for a username -- what URL to query, what a successful response looks like, and what a "not found" response looks like.

Tools and scripts read this file and do the actual checking. That separation means anyone can build a checker, and the data stays accurate regardless of which tool you prefer.

For a site to be included, it must:

1. Be publicly accessible -- sites behind paywalls or login walls can't be checked
2. Include the username in the URL -- the profile URL must contain the username directly
3. Not transform the username -- sites that swap usernames for numeric IDs won't work

In May 2023, we removed the bundled checker scripts and shifted focus entirely to maintaining the data file. See the tools section below for checkers that use our data.

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Tools and Sites That Use WhatsMyName

🌐 Web-based (no install required)

Tool	Type	Description
whatsmyname.app		The go-to web interface by Chris Poulter. Filters by category, exports to CSV, always pulls the latest data.
Who Am I		Chrome/Brave extension combining WMN data with Sherlock and Maigret, by OSINT Liar.
K2OSINT Bookmarklet		Browser bookmarklet -- enter a username in a popup, results open in a new tab.

⌨️ Command-line and scripts

Tool	Type	Description
Naminter		Built specifically for this dataset. Supports Cloudflare bypass, browser impersonation, concurrent checking, and extensive config options.
Blackbird		Fast username search that integrates WMN data.
WhatsMyName-Python		Simple Python script by @C3n7ral051nt4g3ncy.
WhatsMyName-Client		Python script with request header and POST support by @grabowskiadrian. Also useful for testing the JSON config.
Reveal My Name		The original Python checker that shipped with this project, maintained by @yooper.
WMN Screenshooter		Selenium-based helper that screenshots identified profile pages.
sn0int		Uses WMN data in the kpcyrd/whatsmyname module.

🖥️ Desktop and platforms

Tool	Type	Description
NameSeeker		Cross-platform desktop app for username and email search across hundreds of sites. Exports to PDF, CSV, and JSON.
LinkScope		Uses WMN in its Online Identity category.
Maltego WhatsMyName Transforms		Local Maltego transforms that check usernames in real time using the JSON file.
Spiderfoot		Integrates WMN in the sfp_account module. (CLI demo video)

🐳 Self-hosted and containerized

Tool	Type	Description
WhatsMyName-Web		Simple Flask web app version of WhatsMyName by @AXRoux.
WhatsMyName Docker		Docker API wrapper over the WMN tool by @kodamaChameleon.

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Help Keep WMN Accurate