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HTTP headers lookup

Our HTTP headers lookup tool is an essential utility for web developers, security professionals, and site administrators who need to inspect and analyze HTTP response headers from any website. This free tool provides instant access to crucial information about how web servers communicate with browsers, helping you optimize your website's security, performance, and functionality.

By simply entering a URL, you can quickly retrieve and examine all HTTP headers returned by the target server. These headers contain valuable information about security policies, caching instructions, content types, server specifications, and various other critical parameters that affect how your website operates and performs.

Key features of our HTTP headers lookup tool include:

  • Real-time header analysis with instant results
  • Clear, organized display of all response headers
  • Support for both HTTP and HTTPS protocols
  • Ability to check multiple URLs consecutively
  • User-friendly interface requiring no technical expertise

This tool proves invaluable for various tasks, such as:

  • Verifying security headers implementation (HSTS, CSP, X-Frame-Options)
  • Troubleshooting caching issues
  • Debugging cross-origin resource sharing (CORS) problems
  • Checking server configurations
  • Analyzing content delivery network (CDN) settings

Unlike many similar tools that require installation or API keys, our HTTP headers lookup tool is completely free, web-based, and requires no registration. It's part of our comprehensive collection of 130 free web tools, designed to provide developers and webmasters with essential utilities for their daily tasks. Whether you're conducting security audits, optimizing performance, or debugging website issues, this tool offers a quick and reliable way to access the information you need.

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