COOKIEAUDIT
A site can set dozens of cookies, and most of them are not there to keep you logged in. Paste your cookies and COOKIEAUDIT sorts each one into advertising, analytics, functional, or unknown, so you can see at a glance how much of a page is watching versus working. The summary is free; the full per-cookie breakdown and export need a Sovereign pass.
Get your cookies from your browser's dev tools (Application, then Cookies), or paste a Cookie / Set-Cookie header or a cookies.json export. Values are ignored; only the names are read.
COOKIEAUDIT runs entirely in your browser and never uploads anything. It classifies by matching cookie names against a maintained list of known advertising and analytics cookies; an "unknown" cookie is not necessarily safe, just unrecognized. It reads only names, never the values, and it does not change or delete any cookie. Use it to understand a site, then manage cookies in your browser's own settings.