About UsernameChecker

What this site is

UsernameChecker (usernamechecker.net) helps you test a candidate brand handle before you print it on a README, shop, or social bio. Enter a name and we report whether public profile endpoints look taken or free on GitHub, other developer networks, social apps, and marketplaces.

GitHub is our reference check: we use the public Users API (200 = taken, 404 = likely available), the same idea used by open-source availability tools. See the GitHub username guide.

What this site is not

• Not a people finder, skip-trace, or OSINT dossier.
• Not a domain registrar or trademark search.
• Not a guarantee that you can register a name — platforms reserve, throttle, and change pages.

How checks are done

We request public URLs or documented JSON APIs. We do not log into third-party accounts. Rate limits and soft 404 pages are shown as unknown. You should always confirm on the destination site.

Advertising

The site may display Google ads. Ads help pay for hosting. They do not change availability results. Cookie and partner details are in the privacy policy.

Contact

Questions and abuse reports: contact@usernamechecker.net or the contact page.