_fbp — 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?
Identifies a browser for the Meta Pixel: it is used to measure Facebook and Instagram ads and to retarget visitors.
What does it look like?
The value looks like fb.1.1700000000000.1234567890: a prefix, the creation date and a random number.
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 _fbp 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
Do not load the Meta Pixel script (fbevents.js) before consent.
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
Is the _fbp cookie set by Facebook?
It is written on your own domain by the Meta Pixel script, but Meta uses it. It therefore counts as a tracker requiring consent.
Does it disappear if the Pixel is removed?
It is no longer recreated, but the old one stays in browsers until it expires (90 days).
Durations are defaults and may change with configuration. This page describes a cookie; it is not legal advice.