Cookie Defense

Analyzes site cookies and replaces tracking/ad cookie values with fake data. Login and functional cookies are always left untouched.

Cookie Defense analyzes the cookies on the current site (or across your whole browser) and replaces the values of identified tracking/advertising cookies with random, format-valid fake data — the site keeps working normally, but the profile advertisers build from that cookie becomes worthless. Why this is different from other cookie tools: most cookie blockers delete cookies or prevent them from being set, which often breaks site functionality (login, shopping cart). Cookie Defense leaves the cookie in place — only the value becomes useless random data. Features: • Detects 2,000+ tracking cookies (Google, Meta, Criteo, TikTok, RTB House, and dozens more) • Adjustable aggressiveness level (1–5): how aggressively unknown cookies are treated by default • Format-valid fake data (UUID, JSON, JWT, GA client ID, etc.) that passes the tracker's own validation • Backup and restore if obfuscation ever breaks a site • Downloadable Markdown reports of a site's tracking footprint • Login and session cookies are always detected and left untouched • Runs entirely locally — no data is ever sent anywhere • Available in Finnish and English Privacy policy: https://homey-ap.github.io/cookie-defense/ Source code (open source): https://github.com/homey-ap/cookie-defense