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HTTP Headers

View HTTP response status and security headers returned by any web server.

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HTTP Status Codes & Security Headers Guide

Essential HTTP status response codes and recommended security headers for modern web applications.

Header / Status Category Purpose & Best Practice
200 OKSuccess (2xx)Request succeeded; content delivered.
301 Moved PermanentlyRedirection (3xx)Permanent redirect; passes SEO value/link equity.
403 ForbiddenClient Error (4xx)Server refuses request (permissions/firewall block).
404 Not FoundClient Error (4xx)Requested resource does not exist on origin.
500 Internal ErrorServer Error (5xx)Backend application crashed or threw unhandled exception.
502 Bad GatewayServer Error (5xx)Reverse proxy failed to reach backend upstream server.
Strict-Transport-SecuritySecurity HeaderEnforces HTTPS-only browsing (HSTS) on domain.
Content-Security-PolicySecurity HeaderPrevents XSS attacks by restricting authorized script sources.
X-Frame-OptionsSecurity HeaderPrevents clickjacking by disabling iframe embedding.
X-Content-Type-OptionsSecurity HeaderSet to nosniff to prevent MIME type confusion exploits.

About this tool: HTTP Headers

View HTTP response status and security headers returned by any web server.

HTTP Response Headers are metadata directives sent by web servers alongside web page content. They govern browser caching policies, security protections, cookie parameters, and content rendering.

Belangrijkste Toepassingen & Voordelen

  • Verify essential security headers: HSTS, CSP, X-Frame-Options, and X-Content-Type-Options.
  • Optimize caching policies with Cache-Control, ETag, and Expires headers.
  • Identify server software and reverse proxy infrastructure (Nginx, Apache, Cloudflare).
  • Inspect cookie security flags (Secure, HttpOnly, SameSite).
Handige Tip & Best Practice: Always disable verbose Server and X-Powered-By headers in production to avoid leaking exact software versions to potential attackers.

This online diagnostic utility is powered by ToolPing to provide fast, reliable, and secure network analytics for sysadmins and developers.

Frequently Asked Questions (FAQ)

How do I view HTTP response headers?

Enter any website URL and click "Fetch Headers". You will see all HTTP status codes, caching policies, and security directives sent by the server.

Which security headers should every website have?

Essential headers include Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options (prevents clickjacking), and X-Content-Type-Options.

What is the difference between Request and Response headers?

Request headers are sent by your browser to the web server (like User-Agent). Response headers are sent back by the server with instructions on how to handle the content.