What does an HTTP header parser do?

It turns raw response header text into grouped header names, duplicate values, and quick summaries for security, cache, and CORS signals.

No. It only parses the header text you paste.

Can it validate security policy quality?

No. It detects whether common security header names are present, but it does not audit every policy value.

Can it handle duplicate headers?

Yes. Duplicate header names are grouped into arrays in the JSON summary.

Free browser tool

HTTP Header Parser for Response Headers

Paste raw HTTP response headers and turn them into a grouped JSON summary. Use it for CDN QA, cache debugging, CORS review, security header notes, and deployment checklists.

Raw HTTP headers

Paste response headers from a browser, curl output, proxy, CDN panel, or deployment log.

Try a common header review

Headers

Header summary

Grouped results update locally as you edit the pasted header block.

Header names

Security headers

Cache headers

CORS headers

{
  "statusLine": "HTTP/2 200 OK",
  "headers": {
    "content-type": [
      "text/html; charset=utf-8"
    ],
    "cache-control": [
      "public, max-age=3600"
    ],
    "strict-transport-security": [
      "max-age=31536000; includeSubDomains"
    ],
    "x-content-type-options": [
      "nosniff"
    ],
    "access-control-allow-origin": [
      "https://example.com"
    ]
  },
  "count": 5,
  "security": [
    "strict-transport-security",
    "x-content-type-options"
  ],
  "cache": [
    "cache-control"
  ],
  "cors": [
    "access-control-allow-origin"
  ],
  "duplicates": []
}

Header parsing summarizes pasted values for review. It is not a complete security audit, cache audit, or live deployment verification.

Quick answer

An HTTP header parser groups pasted response headers and highlights common signal categories.

Best inputs

Copied response headers

Use browser devtools, curl -I output, CDN panels, or proxy logs.

QA notes

Paste headers before reporting cache, CORS, or security header changes.

Example, assumptions, and limitations

The parser helps organize header text but does not crawl or audit a live URL.

Example

A copied block with cache-control and strict-transport-security appears in cache and security summaries.