WhatsMyName
June 10, 2026 · View on GitHub
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
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.
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:
- Be publicly accessible -- sites behind paywalls or login walls can't be checked
- Include the username in the URL -- the profile URL must contain the username directly
- 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.
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. |
Help Keep WMN Accurate
This project only stays useful if the detections stay accurate. Websites change their profile URLs, response codes, and page content constantly. We need contributors to help find new sites and fix broken detections.
You don't need to be a developer. Here's how to help at any level:
| Experience level | How to contribute |
|---|---|
| No technical background | Submit a site via this form |
| Comfortable with GitHub | Open an issue with a link to an example profile |
| Comfortable with JSON and HTTP | Fork the repo, fix or add a detection, and submit a pull request |
See CONTRIBUTING.md for detailed instructions on adding or fixing site detections, including format requirements and examples.
Stay Connected
Follow the project on LinkedIn for updates.
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.