HTTP Header Parser

About this tool

Paste raw HTTP headers (from a request or response) and get them parsed into tidy name-value pairs.

Example

Input: Content-Type: application/json

Output: Content-Type = application/json

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste raw HTTP headers from a request or response into the input box.
2. Keep each header on its own line, including the first status line only if you want to inspect it separately.
3. Click parse to turn the raw text into clean key-value pairs.
4. Review the parsed headers and copy the normalized output into your notes or debugging workflow.

Step by step, what happens

1. The tool reads the pasted header text line by line and looks for the colon separator used by HTTP headers.
2. It splits each valid header into a name and value, trims extra spaces, and organizes them into tidy pairs.
3. If the input includes a status line or request line, it can be treated as a separate line rather than a header field.
4. The result is a cleaner view that makes it easier to scan, compare, or debug header values.

Worked example

Suppose you copied a response header block from your browser DevTools and want to check the cache and content type values.

Input: HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 Cache-Control: no-cache X-Request-Id: abc123

1. Paste the raw response header text into the parser.
2. The tool separates the status line from the actual headers and splits each header at the first colon.
3. It trims the spaces after each colon so the values are easier to read.
4. You get a clean list of header names with their matching values.

Tips and common mistakes

• Paste only the header block, not the response body, so the parser does not mix headers with page content.
• If a header appears more than once, keep an eye on each line because duplicate headers can be valid in HTTP.
• Do not remove the colon between the header name and value, since that is how the tool identifies each pair.
• If you copied from DevTools, make sure line breaks stayed intact so each header is parsed on its own line.

Frequently asked questions