HTTP Header Checker

HTTP Header Checker is a free online tool that 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.

All

Headers

Security Checks

Fast

Response

Free

Forever

Why Choose HTTP Header Checker on Rune

Speed, clarity, and responsible processing sit at the core of HTTP Header Checker. With all response headers and security analysis, the tool delivers results quickly while using the processing model that fits the job. HTTP Header Checker uses browser processing where practical and server-assisted calls when the workflow needs sharing, lookup, streaming, or conversion.

HTTP Header Checker was built for people who need dependable results without jumping through hoops. Visual score bar showing what percentage of security headers are properly configured. That kind of straightforward design is what sets this apart from the many other tools that promise the same thing.

Key Features of HTTP Header Checker

A complete feature set designed for real http header checker workflows

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.

Key Advantages of HTTP Header Checker

No installation required

HTTP Header Checker opens in your browser. There is nothing to download or configure before you start the core workflow.

All Response Headers

View every HTTP response header returned by the server in an organized display. This feature is available for free with no usage limits on the standard tier.

Server-assisted when needed

HTTP Header Checker uses browser processing where practical and server-assisted calls when the workflow needs sharing, lookup, streaming, or conversion.

Mobile and desktop ready

HTTP Header Checker works on any screen size. The interface adapts to phones, tablets, and desktops so you can use it wherever you are.

No account needed for core use

Use the core HTTP Header Checker workflow without creating an account or providing an email address.

Free with no hidden costs

HTTP Header Checker is completely free on the standard tier. There are no trial periods, no watermarks on output, and no surprise paywalls after you start using it.

Who Benefits from HTTP Header Checker

HTTP Header Checker fits into a wide range of workflows. Here is how different users put it to work.

Students and Academics: Use HTTP Header Checker for assignments, research papers, and coursework. View every HTTP response header returned by the server in an organized display.
Professionals and Teams: Integrate HTTP Header Checker into your daily workflow for faster turnaround on routine tasks. Score based on 7 critical security headers: HSTS, CSP, X-Content-Type-Options, and more.
Content Creators and Freelancers: Speed up your creative process with HTTP Header Checker. Visual score bar showing what percentage of security headers are properly configured.
Developers and Technical Users: Add HTTP Header Checker to your toolkit for quick utility tasks between coding sessions. Headers organized by type: Security, Caching, Content, Server, CORS, and Other.

How to Use HTTP Header Checker

No setup needed, just 3 steps to your result

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

Quick answers for HTTP Header Checker users

Why do I see different headers than my browser DevTools?

Servers, CDNs, redirects, user agents, and request methods can change headers. Compare the final URL, protocol, cache state, and whether you used HEAD or GET.

Which security headers should I check first?

Start with Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options or frame-ancestors, Referrer-Policy, and Permissions-Policy.

What does a missing HSTS header mean?

Without HSTS, browsers are not instructed to force future requests over HTTPS. Add Strict-Transport-Security only after HTTPS works reliably across the whole host.

What is the difference between HEAD and GET?

HEAD asks for headers without the response body, so it is faster. Some servers handle HEAD differently, so use GET if the result looks incomplete or unusual.

Why is my Content-Security-Policy warning important?

A weak or missing CSP can make injected scripts easier to run. A good policy should match the scripts, styles, images, frames, and connections your site actually needs.

Why are cache headers different behind a CDN?

A CDN can add, remove, or override headers such as Cache-Control, Age, ETag, and CF-Cache-Status. Check both origin and CDN responses when debugging caching.

Can this prove a site is secure?

No. Header checks are one layer of review. They help catch common misconfigurations but do not replace code review, dependency updates, TLS checks, and application security testing.

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.

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HTTP Header Checker