Private, browser-local utility
Cookie Header Parser
Parse request Cookie or one response Set-Cookie header locally with values masked by default.
Your input and result stay in this browser tab. Nothing is uploaded, fetched, logged, or stored.
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Result
Cookie-aware parsing
Request mode parses semicolon-delimited cookie pairs. Response mode parses one Set-Cookie record and preserves attribute values such as Expires without comma-splitting. Values are masked until explicitly revealed and are never placed in URLs, DOM attributes, logs, storage, analytics, or network requests.
Limits: 100,000 characters and 200 request cookies. This is an inspection helper, not a browser cookie reader, credential recovery tool, or generic HTTP-header parser.