HTTP Headers Checker

Analyze HTTP response headers, check security configurations, and verify caching...

SecureFastFree

Updated

Press Ctrl+Enter to analyze.

Custom Request Headers (optional)

One header per line in "Key: Value" format

Try a sample:

Security Analysis

Automatically checks for critical security headers like CSP, HSTS, X-Frame-Options, and more with a scored assessment.

Categorized View

Headers are organized into Security, Caching, Content, Server, and Custom categories for quick analysis.

Response Timing

Measures real response time to help you understand server performance and identify bottlenecks.

Header Explanations

Click any header row to reveal a plain-English description of what the header does and why it matters.

SSL Secured
256-bit Encryption
Cloud Processing
Mobile Friendly

Checker Features

Security Score - Get a 0-100 security score based on header analysis
Issue Detection - Automatically detect security issues and information leaks
Recommendations - Get actionable recommendations to improve your headers
Categorized View - Headers organized into Security, Caching, Content, and more
Instant Analysis - Get results in seconds for any URL
Any URL - Check headers for any publicly accessible URL

Why Use HTTP Headers Checker?

Security Analysis

Get a security score and recommendations for improving your HTTP security headers.

Categorized Headers

Headers organized by category: Security, Caching, Content, Connection, and Misc for easy understanding.

Easy to Understand

Clear explanations for each header and plain-language recommendations for improvements.

100% Free

No signup, no limits, no fees. Check headers for unlimited URLs completely free.

Common Use Cases

Security Audits

Verify that your website has proper security headers configured to protect against common attacks.

Debugging

Debug issues with caching, CORS, content types, and other HTTP-related problems.

Performance Optimization

Check caching headers to ensure optimal browser caching and CDN configuration.

Compliance Verification

Verify HTTP headers meet security standards and compliance requirements for your organization.

How It Works

1

Enter URL

Type the URL you want to analyze. Include https:// or we will add it for you.

2

Check Headers

Click the button to fetch and analyze all HTTP response headers from the server.

3

Review Analysis

View your security score, check for issues, and follow recommendations to improve your headers.

HTTP Headers Tips

Start with Security Headers

Focus on adding HSTS, CSP, and X-Frame-Options first - they provide the most security benefit.

Test After Changes

Re-check headers after making server configuration changes to verify they take effect properly.

Hide Server Info

Remove or obfuscate Server and X-Powered-By headers to reduce information disclosure to attackers.

Frequently Asked Questions

HTTP Headers are key-value pairs sent between web browsers and servers during HTTP requests and responses. They contain metadata about the request/response, including content type, caching instructions, security settings, cookies, and authentication information.
Checking HTTP headers helps verify: security configurations (SSL/TLS, HSTS, CSP), caching policies, content types, server information, and potential security vulnerabilities. It's essential for debugging issues, optimizing performance, and ensuring proper security hardening.
Important security headers include: Strict-Transport-Security (HSTS) for enforcing HTTPS, Content-Security-Policy (CSP) for preventing XSS, X-Frame-Options to prevent clickjacking, X-Content-Type-Options to prevent MIME sniffing, and Referrer-Policy for controlling referral information.
The security score (0-100) evaluates how well your website is configured for security based on HTTP headers. Higher scores indicate better security practices. Factors include presence of security headers, proper caching directives, and absence of information disclosure headers.
Caching headers (Cache-Control, Expires, ETag) tell browsers and CDNs how long to store cached content. Proper caching improves performance and reduces server load. However, sensitive pages should have no-cache directives.
Yes, enter any URL to view its response headers. The tool will make a request and display all headers returned by the server. Some headers may be hidden or modified by proxies or CDNs in the path.
Headers are color-coded by category: Green (Security) - important security headers, Blue (Caching) - cache control headers, Purple (Content) - content type and encoding, Gray (Misc) - other informational headers.
Yes, YaliKit's HTTP Headers analyzer is completely free to use with no limits. Analyze headers for as many URLs as you need without signup or hidden fees.

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