Are my authentication cookie tokens stored anywhere?

No! All header parsing runs 100% locally in your browser memory.

Web Developer Tools

Set-Cookie Header Parser

Inspect Set-Cookie directives (Expires, Max-Age, Domain, Path, Secure, HttpOnly, SameSite).

Developer & Code Suite

Syntax Checker & Code Validator

CODE SNIPPET INPUT

SYNTAX VALIDATION STATUS

✅ Valid JavaScript syntax! Zero syntax errors.

About Set-Cookie Header Parser

The HTTP `Set-Cookie` Response Header Parser & Security Auditor inspects server cookie headers, extracting Cookie Name, Value, `Expires` date, `Max-Age`, `Domain`, `Path`, `SameSite` attribute, `Secure`, and `HttpOnly` security flags.

Step-by-Step Guide

How to Use Set-Cookie Header Parser

Step 1

Paste a `Set-Cookie:` header string into the parser.

Step 2

Inspect the detailed breakdown table of security flags and cookie scope.

Step 3

Review the security assessment rating and expiration date.

Step 4

Click "Copy Metadata".

Industry Scenarios

Practical Use Cases for Set-Cookie Header Parser

Web Application Security & Cookie Flag Auditing

Verify that authentication cookies have `Secure`, `HttpOnly`, and `SameSite=Strict` flags set to protect against XSS and CSRF attacks.

Debugging Cookie Domain & Path Scoping Issues

Diagnose why cookies fail to persist across subdomains by auditing `Domain` and `Path` attribute declarations.

Sample Data & Transformation

Input & Output Examples

Auditing Secure Authentication Cookie

Input Sample:

`Set-Cookie: auth_token=abc123xyz; Domain=.example.com; Path=/; Secure; HttpOnly; SameSite=Strict; Max-Age=3600`

Processed Result:

Name: `auth_token` | Value: `abc123xyz` | Security: ✅ Secure, ✅ HttpOnly, ✅ SameSite=Strict | Lifetime: 1 Hour (3,600s)

Technical Capabilities

Key Features & Performance

✓Parses all standard RFC 6265 cookie directives: `Expires`, `Max-Age`, `Domain`, `Path`, `Secure`, `HttpOnly`, `SameSite` (Strict, Lax, None), `Partitioned`.
✓Security audit badge: highlights missing `Secure` or `HttpOnly` flags.
✓Computes exact expiration timestamp from `Max-Age` seconds.
✓100% Client-Side memory execution.
✓1-Click Copy parsed cookie object.

Technical Glossary

Key Terminology & Definitions

`HttpOnly` Flag

A cookie security attribute that blocks client-side JavaScript (`document.cookie`) from accessing the cookie, mitigating XSS token theft.

`SameSite` Attribute (`Strict`, `Lax`, `None`)

A cookie attribute controlling whether cookies are sent with cross-site requests, providing defense against Cross-Site Request Forgery (CSRF).

Frequently Asked Questions (PAA)

Set-Cookie Header Parser FAQs

Modern browsers mandate that third-party cross-site cookies (`SameSite=None`) must also specify `Secure` to ensure they are transmitted exclusively over encrypted HTTPS.