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Basic parserNo AILocal previewDebuggingExport

HTTP Header Parser

Paste HTTP response headers to review status, cache policy, CORS, content type, HSTS, CSP, and other security hints.

Examples
Header analysisReady
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How to use

  1. 1Paste the expression or target URL on the first line, then add --- and the source document when the tool expects both.
  2. 2Load a sample first to learn the input shape, then replace it with your own JSON, XML, YAML, TOML, .env, robots.txt, sitemap, or headers.
  3. 3Review the matched values, warnings, duplicate keys, blocked paths, or security header notes before copying the result into docs or a PR.
  4. 4Keep the original source beside screenshots so teammates can reproduce the preview later.

Common use cases

Debug API responses, XML feeds, deployment configs, SEO files, and HTTP responses without opening several separate tools.Validate AI-generated snippets before they become README examples, production configuration, or support answers.Create focused screenshots for issues, release notes, internal docs, and technical blog posts.

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Generate Mermaid diagrams from a natural language prompt with AI.

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FAQ

Does this send my source to a backend or AI service?

No. These previewers run locally in the browser for the supported parsing path.

Is this a complete replacement for jq, Nginx, Google Search Console, or a production parser?

No. It is a fast preview and debugging surface for common cases. Keep the original tool or production runtime as the final authority.

Why does the input use --- in some tools?

It keeps the expression, URL, or comparison target separate from the document being inspected.

HTTP Header Parser is a focused preview utility for developers who need to inspect scripts, configuration, and structured data quickly.

It is especially useful after AI generation: generate the first draft, preview the behavior, fix obvious issues, then publish the source and screenshot together.

The first version covers common debugging cases and does not replace the original production parser for every edge case.

Demo: parse response headers for launch review

HTTP headers reveal cache, security, CORS, content type, and crawler behavior. A parser makes it easier to inspect a response before debugging in multiple tools.

  • Check cache-control beside CDN behavior.
  • Review CORS headers with the requesting origin in mind.
  • Confirm content-type matches the actual body.
HTTP/2 200
content-type: text/html; charset=utf-8
cache-control: public, max-age=3600
x-frame-options: DENY

Security checklist: headers are defense-in-depth

Header review should catch missing or contradictory security hints, but headers do not replace application security checks.

  • Use HSTS only after HTTPS is correct across subdomains.
  • Set CSP carefully to avoid breaking scripts and previews.
  • Avoid wildcard CORS with credentials.
strict-transport-security: max-age=31536000; includeSubDomains
access-control-allow-origin: https://app.example.com

Review checklist for HTTP Header Parser

Use HTTP Header Parser when you need to inspect source content visually before it becomes documentation, a pull request note, an incident write-up, or a handoff artifact. Parse HTTP response headers and review cache, CORS, content type, and security hints.

Before exporting, check that labels are readable, relationships match the source, generated examples do not contain private data, and the preview still makes sense after you edit the input.

Limits and troubleshooting

If the preview fails, reduce the input to the smallest complete example, confirm the format syntax, and then add sections back one at a time. Many rendering failures come from partial files, indentation mistakes, missing diagram headers, or copied snippets that depend on hidden context.

Treat the preview as a review surface rather than a source of truth. Generated diagrams, converted files, dashboards, and rule examples should be checked before they are used in production documentation or operations.

Example inputs to test

  • Security headers: HTTP/2 200 content-type: text/html; charset=utf-8 cache-control: public, max-age=3600 strict-transport-security: max-age=31536000; includeSubDomains content-security-policy: defaul...
  • CORS response: HTTP/1.1 204 No Content access-control-allow-origin: https://app.example.com access-control-allow-methods: GET, POST, OPTIONS content-type: application/json
  • Cache policy: HTTP/1.1 200 OK content-type: application/javascript cache-control: public, max-age=31536000, immutable etag: "app-v42"

Tool maturity

Basic parser

Basic parser

This tool focuses on fast structure inspection. Use it for review and debugging, then verify critical output before production use.

The maturity label is not a quality score. It tells visitors whether the tool is best for stable export, deeper debugging, quick parsing, or AI-assisted generation.