HTTP Cookie Parser

Parse browser-sent Cookie headers. Quickly view key-value pairs, URL encoding, and duplicate name occurrences.

Parse Result

4 Cookie(s)

#1session

Original value: abc123

Decoded value: abc123

#2theme

Original value: dark

Decoded value: dark

#3locale

Original value: zh-CN

Decoded value: zh-CN

#4callback

Original value: https%3A%2F%2Fgeekformat.com%2Fdone

Decoded value: https://geekformat.com/done

JSON Preview

[
  {
    "index": 0,
    "raw": "session=abc123",
    "name": "session",
    "value": "abc123",
    "decodedValue": "abc123"
  },
  {
    "index": 1,
    "raw": "theme=dark",
    "name": "theme",
    "value": "dark",
    "decodedValue": "dark"
  },
  {
    "index": 2,
    "raw": "locale=zh-CN",
    "name": "locale",
    "value": "zh-CN",
    "decodedValue": "zh-CN"
  },
  {
    "index": 3,
    "raw": "callback=https%3A%2F%2Fgeekformat.com%2Fdone",
    "name": "callback",
    "value": "https%3A%2F%2Fgeekformat.com%2Fdone",
    "decodedValue": "https://geekformat.com/done"
  }
]

Parse Cookies online, see exactly what the request carries at a glance.

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Use Cases

When API has Cookies but still shows not logged in, first confirm what values are actually sent in the request header
Analyze Cookie original values and URL decoded values to troubleshoot encoding anomalies when debugging session expiration issues
Quickly parse Cookie text after packet capture to view login state and business parameters, and check for duplicate Cookie names
Check authentication anomalies caused by multiple same-name Cookie conflicts or empty values, and copy normalized results

Features

Each Cookie expanded separately: Name, value, and decoded result no longer mixed in one string
Login issues easier to troubleshoot: Not logged in, session lost, name conflicts - check here first
Encoded content viewing: Easy to check URL encoding, special characters, and duplicate Cookie situations
Paste and view instantly: Perfect for dev, test, and ops to quickly analyze Cookie text from browsers or packet captures

How to Use

1.Paste Cookie request header text from browser or packet capture tool into input area
2.Tool automatically splits Cookie key-value pairs and displays total Cookie count, each Cookie's sequence number, name, original value, and decoded value
3.Check for duplicate Cookie name warnings, confirm each Cookie value is normal
4.Copy normalized Cookie string for debugging records or share with team for troubleshooting

FAQ

Why is the API still showing not logged in even with Cookies?

Common causes include wrong Cookie name, empty value, encoding anomaly, or multiple same-name Cookies overwriting each other. Breaking down item by item usually finds the issue.

Can this tool view URL-encoded Cookie values?

Yes. It's suitable for checking URL encoding, special characters, callback parameters, and nested content, making it easy to troubleshoot login state or business parameter passing errors.

Is it suitable for debugging Cookies from browsers, API docs, and packet captures?

Yes. Whether browser request headers, packet capture tool exported headers, or Cookie text from integration environments, you can directly paste and parse.

Can it identify duplicate Cookies or abnormal formats?

Yes. The tool helps you split key-value pairs and assists in identifying duplicate key names, empty values, or non-standard format issues.

HTTP Cookie Parser