A cookie scanner is an automated tool that crawls a website and detects all cookies and tracking technologies active on its pages — including first-party cookies, embedded third-party scripts, and pixels. Scanners identify each cookie's name, domain, type, purpose, and lifespan, and categorize them into standard groups: strictly necessary, functional, analytics, performance, and marketing. GDPR and the ePrivacy Directive require full disclosure of all tracking technologies — a consent banner can only obtain valid consent for cookies the site owner knows about. Running undisclosed cookies is a compliance violation. ConsentBit's scanner detects new cookies within 24 hours and categorizes them automatically.