You can also use a browser extension like "Facebook ID Finder" or an online tool like "Find Facebook ID" to quickly retrieve your fbid.
If your URL shows a custom username, follow these steps: find my fbid
For users comfortable with Facebook’s developer tools, the Graph API Explorer (developers.facebook.com/tools/explorer) provides the most direct answer. After generating a user access token, a simple GET /me request returns a JSON object containing id , name , and other public fields. The id field is your FBID. You can also use a browser extension like
Go to your Profile → Tap the three dots (...) next to "Edit Profile" → Look at the bottom under Your Profile Link . The text after the last slash is your username. find my fbid