Dev
Mock Cookie Header Generator
Used by developers, writers, and creators worldwide.
A mock cookie header generator produces example Set-Cookie header values with realistic attributes for testing and documentation. The Set-Cookie header has a specific format — a name and value followed by attributes like Path, HttpOnly, Secure, and SameSite — and code that sets, parses, or tests cookies needs realistic samples. This tool emits well-formed headers with random values and common security attributes. Choose how many you want and copy them in. It is ideal for testing cookie parsing, documenting a session setup, and learning cookie attributes. Each header follows the real syntax and includes the attributes that matter for security, so they make good examples and test inputs. Note what the attributes do: HttpOnly hides a cookie from JavaScript, Secure restricts it to HTTPS, and SameSite controls cross-site sending. Adapt the names and values to your own application, and choose the security attributes deliberately when you set real cookies.
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How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Choose how many headers you want.
- Click Generate to produce Set-Cookie headers.
- Copy them into your test or docs.
- Set security attributes deliberately for real cookies.
Use Cases
- •Testing cookie parsing
- •Documenting a session setup
- •Learning cookie attributes
- •Seeding example headers
- •Demoing cookie security flags
Tips
- →HttpOnly hides cookies from JavaScript.
- →Secure restricts cookies to HTTPS.
- →SameSite controls cross-site sending.
- →Make session cookies HttpOnly and Secure.
FAQ
what do the cookie attributes mean
Path scopes the cookie to a URL path; HttpOnly hides it from JavaScript to reduce XSS risk; Secure restricts it to HTTPS; SameSite controls whether it is sent on cross-site requests; and Max-Age sets how long it lives. Together they govern a cookie's behaviour and security.
why does HttpOnly matter
HttpOnly prevents client-side JavaScript from reading the cookie, which protects session tokens from theft via cross-site scripting. Sensitive cookies like session IDs should almost always be HttpOnly, along with Secure and an appropriate SameSite setting.
are these real cookies
No. The values are random and the cookies authenticate nothing, so they are safe for tests and documentation. They follow the real Set-Cookie format with realistic attributes, which is what matters for exercising your code.