Cookie Parser & Set-Cookie Builder

Inspect raw Cookie and Set-Cookie headers, validate modern browser rules, and generate secure cookie headers without leaving your browser.

Parse request cookies into key/value pairs

Decode and validate response cookie attributes

Generate production-ready Set-Cookie headers

Header Playground

Paste raw headers or build one below

Cookie header (request)

Useful for parsing browser request cookies into separate entries.

Set-Cookie header (response)

Paste one or multiple Set-Cookie lines. One per line works best.

Generated Set-Cookie

Nothing generated yet.

Security-first defaults

Cookie name

Cookie value

Domain

Path

Expires

Max-Age (seconds)

SameSite

Priority

Secure HttpOnly Partitioned SameParty

Validation, risk flags, and parsed values

Request Cookies

Response Cookies

Warnings

Validation Summary

No analysis yet

Cookie Pairs

Paste a Cookie header to parse request cookies.

Decoded attributes

Paste Set-Cookie headers to inspect attributes and browser rules.

Modern defaults worth considering

Start by analyzing a real header.You’ll see security suggestions and compatibility notes here.