Tool-You

Cookie Header

Split a Cookie header into name=value lines.

Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.

What Cookie Header does

Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.

Practical limit for Cookie Header: Semicolon pairs with equals. Empty fails. Not a URL query. That is why output can differ from heavy desktop Network software. Read the tool-specific note again: Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.

How to use Cookie Header

  1. Keep this tab on Cookie Header (/network/cookie-header). Pasting into the wrong Network tool (for example User-Agent Parse) changes the job.
  2. Paste or type the input Cookie Header expects. Path hint: network · cookie header. Split a Cookie header into name=value lines.
  3. Apply the Cookie Header action only. Parse URL is a different transform (Split a URL into host, path, query, and more.). Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.
  4. Copy the output of Cookie Header if you need it elsewhere. Size/complexity still follows: Semicolon pairs with equals. Empty fails. Not a URL query.
  5. If the text job is actually Guess browser family, version, OS, and mobile., leave Cookie Header and open User-Agent Parse.

When not to use Cookie Header

Skip Cookie Header when a neighbor tool matches better — start with User-Agent Parse or Parse URL — or when the description already warns the job will fail. In the tool’s own words: Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.

Questions about Cookie Header

What does Cookie Header do that other Network pages on this site do not?
Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only. Short version: Split a Cookie header into name=value lines.
Does Cookie Header upload my file or text to Tool-You servers?
No. Cookie Header runs in this browser tab. Files stay on the device. Limit note: Semicolon pairs with equals. Empty fails. Not a URL query.
Should I use User-Agent Parse instead of Cookie Header?
Use Cookie Header when you need Split a Cookie header into name=value lines. Use User-Agent Parse when you need Guess browser family, version, OS, and mobile. They share a category (Network) but not the same job.
What are the limits of Cookie Header?
Semicolon pairs with equals. Empty fails. Not a URL query. Also: Splits on semicolons and keeps name=value pairs. Unlike Query to JSON this is not a URL query. Unlike User-Agent this is not a browser string. Missing equals fails. Local only.

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