HTTP Headers Checker

Analyze Server Responses

Display response headers, status code, server type, cache information, and security headers for any URL

What is HTTP Headers Checker?

The HTTP Headers Checker is a diagnostic tool that reveals the hidden response headers sent by a web server. It is essential for developers debugging redirects, caching policies, and security configurations.

How to Use HTTP Headers Checker

Enter Target URL

Input the full web address you want to inspect.

Send Request

Click the check button to initiate a standard HTTP GET request.

Analyze Output

Review the raw HTTP status code and the list of key-value header pairs returned by the server.

Key Features

Displays precise HTTP status codes

Reveals caching headers and expiry times

Identifies server software

Checks security headers like CORS and HSTS

Traces redirect chains

Tips & Best Practices

1
Use this to verify if your 301 redirects are working correctly without relying on browser caching.
2
Check the Cache-Control headers to troubleshoot why a page isn't updating for your users.
3
Analyze security headers to ensure your site is protected against common vulnerabilities like clickjacking.

Why Use Our Online HTTP Headers Checker?

HTTP Headers Checker performs real-time network lookups using live data sources. Whether you're troubleshooting DNS issues, investigating IP addresses, or validating SSL certificates, results are instant and accurate. No software installation needed — just open the page and query.

Real-Time DataLive lookups

Multiple ProtocolsDNS, IP, SSL & more

Copy FriendlyDocumentation ready

No InstallBrowser-based

Frequently Asked Questions

What is a 301 vs 302 redirect?

A 301 status indicates a permanent move, telling search engines to update their index. A 302 indicates a temporary redirect.

Why does the tool show different headers than my browser?

Some servers serve different headers based on the User-Agent. This tool uses a standard bot User-Agent.

What is the Strict-Transport-Security header?

Also known as HSTS, this security header forces browsers to only load the website over a secure HTTPS connection.

Can this tool bypass firewalls?

No. If a server blocks the request by returning a 403 Forbidden, the tool will simply display those restriction headers.

Related Tools

Website Speed Test

Measure page load time, response time, and core web vitals performance metrics for any website

SSL Certificate Checker

Check SSL certificate validity, issuer, expiration date, and certificate chain for any website securely

Browser Information

Detect your browser, operating system, screen resolution, and system details instantly

Data Usage Calculator

Estimate your monthly internet data usage from YouTube, TikTok, Netflix & more — get Nepal ISP package suggestions