What is a Facebook UID?

A Facebook UID (User ID) is the unique numeric identifier assigned to every Facebook account. It never changes, even if the username is updated.

How do I find someone's Facebook User ID?

Paste the Facebook profile URL, username, or numeric ID into the lookup tool and click 'Look Up UID'. The tool will return the numeric User ID along with the display name and profile picture.

Does this tool work for Facebook Pages?

Yes. The tool supports personal profiles, Facebook Pages, and most public profile types.

Facebook UID Lookup — Find Any Facebook User ID Instantly

Facebook Profile URL, Username, or ID *

Accepts: zuck · facebook.com/zuck · profile.php?id=4 · 4

Accepted input formats

Username

zuck ✓ works

mark.zuckerberg ✓ works

Full URL

https://www.facebook.com/zuck ✓ works

facebook.com/zuck also ok

Numeric ID

4 ✓ works

100065115110193 ✓ works

profile.php?id=4 also ok

People URL

facebook.com/people/John-Doe/100000123456 ✓ works

Tip: Copy the URL straight from your browser's address bar while viewing the Facebook profile — that's the fastest way to get the right input. Private or deactivated accounts may not return a UID.

Frequently Asked Questions

Is this tool free to use?

Yes, the tool is completely free. No account, registration, or payment is required.

What can I enter into the input field?

You can enter a plain username (e.g. zuck), a numeric Facebook ID (e.g. 4), or any Facebook profile URL including facebook.com/username, facebook.com/profile.php?id=…, or facebook.com/people/Name/ID format. The tool normalises all of these automatically.

Do I need to be logged in to Facebook?

No. Results may vary for accounts with strict privacy settings, as those profiles limit what is publicly accessible.

How accurate are the results?

UIDs are fetched directly from Facebook and are 100 % accurate. Since UIDs are permanent identifiers they will never change for a given account.

Why would I need someone's Facebook UID?

Common use cases include building Facebook Login integrations, targeting specific accounts in the Graph API, configuring ad audiences, or identifying an account reliably when its username has changed.

Is it legal to look up a Facebook UID?

Yes. UIDs are part of Facebook's publicly accessible data. This tool only retrieves information that Facebook itself makes publicly available — no private data is accessed.

What if the tool can't find a UID?

This typically happens when a profile is set to private, the URL is malformed, or the account has been deactivated. Double-check that the input is copied directly from a browser address bar and that the profile is publicly viewable.