FreeUsername
How it works
FreeUsername checks one username across 3,450+ public websites and shows you, site by site, where a profile with that name appears to exist. Here is what happens when you press search.
Free, no sign-up. Checks 3,450+ sites; the username is not stored or logged.
The scan
- Your browser splits the site list into small batches and sends them, with the username, to our server.
- For each site in a batch, our server requests that site's public profile URL for the username, the same page anyone could open in a browser.
- The server classifies each response with our own detection rule for that site, for example by checking the status code or text that appears only on real profiles.
- Results stream back to your screen live, so you can start reading before the scan finishes.
- For found results, the tool fetches public profile details (name, avatar, bio) when the site makes them available.
You can check up to 5 usernames at once, check whether the name is free as a .com, .net, .org, .io, .us, .app or .dev domain (via public RDAP data), and export everything as JSON or CSV.
What the statuses mean
- Found: the site returned what looks like an existing public profile.
- Not found: the response matched the pattern for a missing profile, which usually means the name is free there.
- Blocked: the site refused or rate-limited our request, so no answer was possible.
- Unknown: the response did not clearly match either pattern, for example after a timeout or a page redesign.
Privacy
The username is sent to our server only to run the check. It is not stored or logged. There is no sign-up. Read the full privacy policy.
Limits
- Some sites block automated requests, which shows up as Blocked. Open those profiles in your browser to check by hand.
- Sites change their pages, and our detection rules can lag behind, so false positives and missed profiles happen.
- A matching username is not proof of who owns an account. Results are leads to verify, not facts about a person. FreeUsername is not a consumer reporting agency; do not use results for FCRA purposes.
How we measure accuracy
We publish what we test. Our username data study ran 60 handles across every site and counted how often each status came back, including false positives. How we choose, test and re-check sites explains the nightly re-check that hides a site when its rule stops working. A Found result means a profile answered at that exact address; it is a confirmed public profile, not a confirmed person. Matching names on two sites are only a probable link until other details, such as a linked website or the same photo, agree.
FAQ
Is the username search free?
Yes. It is free to use and there is no sign-up or account.
How many sites does it check?
3,450+ sites. Every one runs through our own search engine, with a detection rule we wrote for that site.
Do you store the usernames I search?
No. The username is sent to our server only to run the check. It is not stored or logged.
Can I check more than one username at a time?
Yes. You can check up to 5 usernames at once, which is useful for comparing variations of a name.
What do Found, Not found, Blocked and Unknown mean?
Found: the site returned what looks like an existing public profile. Not found: the response matched the pattern for a missing profile. Blocked: the site refused or rate-limited the request. Unknown: the response did not clearly match either pattern.
Why does a result say Found when the profile does not exist?
That is a false positive. Websites change their pages, and our detection rules can lag behind. Treat every result as a lead and open the profile yourself to confirm it.
Does a Found result mean a profile belongs to a specific person?
No. It only means a profile with that username appears to exist on that site. Many unrelated people use the same handles, and accounts can be recycled or impersonated. Results are leads to verify, not facts about a person.
Can I export the results?
Yes. You can download the results as JSON or CSV.
Does it check domain names too?
Yes. It checks whether the name is available as a .com, .net, .org, .io, .us, .app or .dev domain using public RDAP registration data.
Can I use the results for background checks or hiring?
No. FreeUsername is not a consumer reporting agency. Results must not be used for employment, tenant screening, credit, insurance or any other purpose covered by the Fair Credit Reporting Act (FCRA).
Ready to try it? Search a username for free, or read the blog for step-by-step guides.