ZapCookie

Free Cookie Parser & Builder

Your data never leaves your browser

Cookie Header String

Set-Cookie: header

Parsed Cookies 0

Detected Issues

Set-Cookie Attributes

Name *

Value *

Domain

Path

Max-Age (s)

Expires

SameSite

Flags

Secure HttpOnly Encode value

Generated Set-Cookie Header

Fill in the Name and Value fields to generate a Set-Cookie header.

Quick Presets

Input

URL Encoded

—

URL Decoded

—

Base64 Encoded

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Base64 Decoded

—

Encoding Notes

Cookie values must not contain whitespace, commas, or semicolons. Characters outside the ASCII printable range (0x21–0x7E, excluding ; , \) must be percent-encoded. Use URL Encoding for general-purpose values. Use Base64 for binary or structured data (e.g. serialised objects).

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Detected Issues

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