_fbc — Meta Pixel (Facebook)
By the OpenCookies team · published 2026-10-22 · updated 2026-10-22
- Service
- Meta Pixel (Facebook)
- Category
- Advertising and profiling
- Default duration
- 90 days
- Type
- First-party cookie (set by your own site)
- Consent required?
- Yes, before any storage or reading.
What is it for?
Stores the click ID (fbclid) when a visitor arrives from a Meta ad.
What does it look like?
The value looks like fb.1.1700000000000.XXXXXXXX, where the end repeats the fbclid click ID.
How to see it in your browser
Open your site, press F12, then choose the “Application” tab (Chrome, Edge) or “Storage” (Firefox). Under “Cookies”, select your site’s address: the _fbc cookie appears in the list if present, with its value and expiry date.
What does the rule say?
Targeted advertising, remarketing and profiling require prior, free and informed consent. These cookies cannot be exempted.
How to prevent it before the choice
Same method as _fbp.
How OpenCookies handles it
Common services like this one are in OpenCookies’ tracker list: the banner neutralizes their script before the visitor chooses and only restarts it after “Accept”. The test shows whether this cookie appears before the choice, after “Refuse” and after “Accept”.
Check it on my site
Does this cookie appear on your site before the visitor chooses? The OpenCookies test shows it in two minutes.
Related cookies
Frequently asked questions
When does this cookie appear?
Only when a visitor arrives from a Meta ad or link containing an fbclid parameter.
Is it related to _fbp?
Yes, both are created by the Meta Pixel. _fbp identifies the browser, _fbc keeps track of the click.
Durations are defaults and may change with configuration. This page describes a cookie; it is not legal advice.