Developer Tools
Parse raw HTTP headers into structured JSON.
Use this HTTP header parser to transform raw HTTP request or response headers into structured JSON. It is useful for debugging proxies, APIs, browser requests, server responses, and copied header blocks when plain text headers are hard to inspect.
Use this HTTP header parser to transform raw HTTP request or response headers into structured JSON. It is useful for debugging proxies, APIs, browser requests, server responses, and copied header blocks when plain text headers are hard to inspect.
Use http header parser when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
GET / HTTP/1.1 Host: example.com User-Agent: TestAgent
Output
Structured header JSON
Parses raw request-style headers into a cleaner machine-friendly format.
Fix: Paste the full header lines as they appear in the request or response.
Fix: Use this tool only for headers, not full HTTP body content.
Fix: Remember that repeated header names are often grouped together in structured output.
Paste raw HTTP headers from a request or response, including the first request or status line if you have it.
Repeated header names are grouped into arrays in the parsed output.
Yes. It is useful for both request-style and response-style header blocks.
Yes. It works online in the browser.
Use it when you want header names and values extracted into a structured format instead of reading raw lines manually.