HTTP Cookie Parser & Generator
About Cookie String Generator
The HTTP `Set-Cookie` Header & `document.cookie` Builder creates standards-compliant cookie strings with custom names, values, expiration dates, `Max-Age`, `Domain`, `Path`, `SameSite`, `Secure`, and `HttpOnly` flags for server responses and client scripts.
How to Use Cookie String Generator
Step 1
Enter cookie name and value.
Step 2
Configure desired security flags (Secure, HttpOnly, SameSite) and expiration time.
Step 3
Review the generated `Set-Cookie` header and JavaScript code.
Step 4
Click "Copy Cookie String".
Practical Use Cases for Cookie String Generator
Configuring Web Server & API Response Cookies
Generate formatted `Set-Cookie:` response header strings for Express.js, Fastify, Next.js API routes, and Nginx configurations.
Client-Side `document.cookie` Script Generation
Generate copy-pasteable JavaScript snippets to set local cookies with exact path and max-age settings.
Input & Output Examples
Generating Production Session Cookie
Name: "session", Value: "token123", Max-Age: 7 days, Secure: true, HttpOnly: true, SameSite: Lax
`Set-Cookie: session=token123; Max-Age=604800; Path=/; Secure; HttpOnly; SameSite=Lax`
Key Features & Performance
- ✓Generates both HTTP Server `Set-Cookie:` header format and Client `document.cookie` JavaScript syntax.
- ✓Interactive controls for all RFC 6265 attributes: `Path`, `Domain`, `Max-Age`, `Expires`, `Secure`, `HttpOnly`, `SameSite`.
- ✓Supports modern `Partitioned` (CHIPS) cookie flag for third-party embeds.
- ✓100% Client-Side generation.
- ✓1-Click Copy cookie string.
Key Terminology & Definitions
CHIPS / `Partitioned` Cookie
Cookies Having Independent Partitioned State: a privacy standard allowing third-party cookies partitioned by top-level site context.
`Max-Age` vs `Expires`
`Max-Age` defines cookie lifespan in seconds (modern standard); `Expires` defines an exact GMT date string (legacy fallback).