Cookie Lens

Privacy-first Chrome DevTools extension for inspecting, editing, parsing, monitoring, mocking, and exporting browser cookies.

Cookie Lens is a privacy-first Chrome DevTools extension for inspecting, editing, parsing, monitoring, mocking, and exporting browser cookies. It gives developers a clearer and safer cookie debugging workspace directly inside DevTools. With Cookie Lens, you can: • Inspect cookies for the current site • Search, filter, sort, pin, and protect cookies • Detect expired, oversized, risky, or misconfigured cookies • Edit cookie values, domain, path, expiration, SameSite, Secure, and HttpOnly attributes • Automatically detect structured values such as JSON, URL-encoded JSON, Base64, JWT-like values, query strings, and key-value cookies • Edit decoded or structured cookie values safely • Mock cookie values for testing without losing the original value during the session • Review security, privacy, expiry, and size reports • Export cookies as JSON • Import cookies with validation and conflict handling • Optionally track which network response set or updated a cookie Cookie Lens is designed for frontend engineers, QA engineers, backend engineers, web platform teams, and anyone debugging cookie behavior in modern web applications. Privacy-first by design: Cookie Lens processes cookie data locally in your browser. It does not send cookie values, authentication tokens, JWTs, session identifiers, browsing data, request bodies, response bodies, or exported files to any remote server. Persistent storage is used only for non-sensitive preferences such as theme, table layout, pinned cookie identifiers, protected cookie identifiers, and feature settings. Optional "Set by request" tracking is disabled by default and only runs when explicitly enabled by the user. Cookie Lens is not just a cookie editor. It is a DevTools-native cookie debugging, parsing, mocking, export, and audit workspace.