HTTP Header Checker
Check HTTP response headers for any URL. View status codes, content types, security headers, caching policies, and server information. Analyze and process URLs directly in your browser with instant results.
What is HTTP Header Checker | Rune
HTTP Header Checker fetches and displays all HTTP response headers for any URL. See the full server response including status code, content type, caching directives, CORS headers, and server information.
Includes a security header analysis that scores your site on 7 critical security headers: HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Permissions-Policy, Referrer-Policy, and X-XSS-Protection. Headers are organized by category for easy review. Essential for web developers, SEO specialists, and digital marketers who work with URLs and web infrastructure. Analyzes results in real time with detailed reports and actionable insights for your web properties.
Key Features of HTTP Header Checker
Everything you need for professional http header checker
All Response Headers
View every HTTP response header returned by the server in an organized display.
Security Analysis
Score based on 7 critical security headers: HSTS, CSP, X-Content-Type-Options, and more.
Security Score
Visual score bar showing what percentage of security headers are properly configured.
Header Categories
Headers organized by type: Security, Caching, Content, Server, CORS, and Other.
HEAD/GET Methods
Choose HEAD for fast header-only requests or GET for full response with headers.
Copy Headers
Copy individual headers or all headers at once to clipboard.
How to Use HTTP Header Checker
Follow these simple steps to get started
Enter URL
Enter the URL you want to check response headers for.
Choose Method
Select HEAD (faster) or GET (full response) method.
Review Results
See headers by category and review the security header analysis.
Pro Tips
- A security score of 70%+ is good. Key headers to have are HSTS, CSP, and X-Content-Type-Options.
- HEAD requests are faster because the server doesn't send the response body, just headers.
- Check Cache-Control and ETag headers to verify your caching strategy is working correctly.
- Missing HSTS header means browsers won't enforce HTTPS, add it with a long max-age for security.
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Frequently Asked Questions
Everything you need to know about HTTP Header Checker
What are HTTP headers?
HTTP headers are key-value pairs sent between browsers and servers with every request and response. They contain metadata about the content, caching rules, security policies, and server information.
Why check security headers?
Security headers protect against common web attacks like XSS, clickjacking, and MIME-type sniffing. Missing security headers leave your site vulnerable to exploitation.
What is a good security score?
A score of 70%+ is good. Key headers to have are Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Content-Type-Options, and X-Frame-Options.
What is the difference between HEAD and GET?
HEAD requests only fetch headers without the response body, making them faster. GET fetches the full response. Both return the same headers in most cases.
What is HSTS?
HTTP Strict Transport Security (HSTS) tells browsers to always connect via HTTPS, preventing downgrade attacks. It's set via the Strict-Transport-Security response header.
What is Content-Security-Policy?
CSP is a security header that controls which resources (scripts, styles, images) a page can load. It helps prevent XSS attacks by whitelisting allowed content sources.
Is HTTP Header Checker free?
Yes! HTTP Header Checker is 100% free with no usage limits. Check headers for as many URLs as you need without signing up.
What is X-Frame-Options?
X-Frame-Options is a security header that controls whether your page can be embedded in an iframe. Setting it to DENY or SAMEORIGIN prevents clickjacking attacks where attackers overlay invisible frames on your site.
Still need help?
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