HTTP Header Parser

The HTTP Header Parser is a tool that analyzes raw HTTP headers from requests or responses. Simply paste your headers in the standard "Header-Name: Value" format, and the tool will categorize them, provide descriptions for common headers, and offer export options in various formats.

The tool categorizes headers into six types: Request headers (Accept, User-Agent, etc.), Response headers (Content-Type, Server, etc.), Security headers (CSP, HSTS, etc.), Cache headers (Cache-Control, ETag, etc.), Custom headers (typically X- prefixed), and General headers.

Headers should be in standard HTTP format: "Header-Name: Header-Value" with one header per line. The tool accepts headers copied from browser developer tools, server logs, or any HTTP debugging tool. Status lines and empty lines are automatically ignored.

Yes! The tool offers three export formats: Original format (as entered), JSON object format (for programming use), and cURL header format (for command-line requests). Each format can be copied to clipboard with a single click.

For each header, the tool shows: the header name and value, category classification, and descriptions for common headers explaining their purpose and usage. Security and cache headers get special attention with detailed explanations.

The tool performs basic format validation by checking for the presence of colons and proper header structure. However, it doesn't validate specific header values against HTTP specifications - it focuses on parsing and categorizing existing headers.

Absolutely! The tool can parse headers from both HTTP requests and responses. It automatically categorizes headers based on their typical usage, and you can filter by category to focus on specific types like request-only or response-only headers.

The tool specifically identifies and categorizes security-related headers like Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and others. It highlights these with red badges and provides descriptions to help you understand their security implications.

Yes, all header parsing is performed entirely in your browser using client-side JavaScript. No header data is sent to any server or stored anywhere. Your sensitive header information, including authorization tokens, remains completely private.

Definitely! This tool is excellent for debugging HTTP communication issues. You can paste headers from failed requests to analyze authentication headers, content types, or caching directives. The categorization helps quickly identify potential issues.

Ensure headers are in the correct format with colons separating names and values. Remove any status lines (like "HTTP/1.1 200 OK") and ensure each header is on its own line. If you're copying from browser dev tools, copy only the header lines, not the entire request/response.

For optimal results: (1) Copy headers directly from browser developer tools or server logs, (2) Ensure one header per line in "Name: Value" format, (3) Remove status lines and empty lines, (4) Use the category filters to focus on specific header types, and (5) Check the descriptions for unfamiliar headers to understand their purpose.