cf_clearance is set by Cloudflare to mark visitors who have passed a Cloudflare security challenge. It enables access for legitimate users while helping block automated attacks.
Cookie details
- Set by: Cloudflare (Cloudflare's security/CDN services).
- What it does: Stores a clearance token proving the visitor passed Cloudflare's challenge so they can access protected resources.
- Duration: Persists for the clearance token lifetime (typically from a few hours up to several days, depending on configuration).
- Consent type: Necessary — used for security and site functionality, not for tracking.
To find cf_clearance in your browser, see our quick guide on inspecting cookies: How to Inspect Cookies in Your Browser.