Is HTTP Headers Checker free?

Yes, completely free with unlimited checks and no registration required. No hidden fees or premium upgrades.

What are HTTP headers and why do I need to check them?

HTTP headers are metadata sent by web servers that contain information about the response, cache settings, security policies, and server type. Checking them helps with SEO, security audits, debugging, and understanding site performance.

Can I check headers for any website?

Yes, you can check headers for any publicly accessible URL. The tool works on live websites, but cannot access password-protected or private pages.

What does a 200 status code mean?

A 200 status code means 'OK' — the request was successful and the server returned the requested resource without errors.

How do I interpret the Cache-Control header?

Cache-Control tells browsers how long to store (cache) a page. Values like 'max-age=3600' mean cache for 3600 seconds. 'no-cache' means revalidate before using, and 'no-store' means don't cache at all.

What is the Set-Cookie header?

Set-Cookie headers tell your browser to store cookies — small data files used for tracking sessions, preferences, and user data. Each Set-Cookie header creates one cookie.

Why do some URLs show 301 or 302 status codes?

301 (Permanent Redirect) and 302 (Temporary Redirect) mean the server is directing your request to a different URL. This is common for domain migrations, old page URLs, or mobile redirects.

Can I check headers on mobile devices?

Yes, HTTP Headers Checker works on iPhone, Android, iPad, and all mobile browsers. The interface is fully responsive and mobile-optimized.

Is my data safe when checking headers?

Yes. The tool processes requests securely and never logs or stores the URLs you check. All data transmission is encrypted over HTTPS.

What does the Server header tell me?

The Server header reveals what web server software the site uses (Apache, Nginx, IIS, etc.). This information can be useful for security audits and understanding site infrastructure.

How often can I check headers?

Unlimited. There's no rate limit or daily quota. Check as many URLs as needed without any restrictions.

Can I check headers for subdomains?

Yes, enter the complete subdomain URL like https://subdomain.example.com and the tool will check headers for that specific subdomain.

fast

HTTP Headers Checker — fast

View HTTP response headers for any URL.

How to use HTTP Headers Checker

Enter Your URL in the Input Field

Paste the complete URL (including https:// or http://) into the text input box at the top of the page. For example: https://example.com or https://example.com/page. Click the blue 'Check Headers' button to submit.

Review the HTTP Response Headers Table

View the results displayed in a table with two columns: Header Name and Header Value. Common headers include Content-Type, Cache-Control, Server, Set-Cookie, and X-Frame-Options. Scroll down to see all available headers returned by the server.

Analyze Key Header Information

Identify critical headers for your analysis: Status Code (200, 301, 404, etc.), Content-Length (file size in bytes), Last-Modified (last update date), and Security headers like Strict-Transport-Security. Use the 'Copy' button next to each header to copy individual values.

Export or Share Your Results

Click the 'Download Results' button to export headers as a .txt file, or use the 'Share' icon to generate a shareable link containing your checked URL and results for collaboration or documentation purposes.

Frequently Asked Questions

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