About The Set Cookie Parser

Set Cookie Parser breaks response-side Set-Cookie header lines into structured cookie names, values, and attributes such as Path, Domain, Expires, Max-Age, Secure, HttpOnly, and SameSite.

Parsing runs locally in your browser. Use sanitized examples when possible because real Set-Cookie headers can contain sensitive session values.

How to Parse Set-Cookie Headers Online

1. Paste one or more Set-Cookie response header lines.
2. Click Parse Set-Cookie.
3. Review the structured JSON output for names, values, and attributes.

Choosing Options Correctly

This tool is for response headers. Use Cookie Parser for request-side Cookie headers that contain only semicolon-separated name/value pairs.

Common Use Cases

• Checking whether Secure, HttpOnly, and SameSite are present.
• Comparing cookie attributes across environments.
• Documenting response headers during browser behavior debugging.

Quick FAQ

Can it parse multiple headers?
Yes. Paste each Set-Cookie header on its own line when the tool supports multiple lines.

Why is a cookie not parsed?
The header may be incomplete, folded incorrectly, or use malformed attributes or expiry date formatting.

Should I paste production cookies?
Avoid pasting live session cookies or authentication cookies. Redact values before analysis.

What flags should I review?
Check Secure, HttpOnly, SameSite, Domain, Path, Max-Age, Expires, and whether the value should be host-only.