DevUtilsNow
Browse tools
// http header · response header

Set-Cookie

Send a cookie to the client

What the Set-Cookie header does

Set-Cookie sends a cookie to the client to be stored and returned on later requests. Its attributes matter for security: HttpOnly blocks JavaScript access, Secure restricts it to HTTPS, and SameSite limits cross-site sending to reduce CSRF.

Example

Set-Cookie: sid=abc; HttpOnly; Secure

Where it's used

Set-Cookie is a response header. Response headers are sent by the server to describe the response and tell the client how to handle it.

Other response headers

Content-Encoding Content-Disposition ETag Last-Modified Location Set-Cookie Server Retry-After WWW-Authenticate
TOOL

HTTP Headers Parser

Turn a block of raw headers into readable JSON.

REFERENCE

All HTTP Headers

Common request, response, caching, CORS, and security headers.

GUIDE

How to Read and Parse HTTP Headers

The anatomy of headers and how to work with them.