Enter a URL and see all response headers: security headers (CSP, HSTS), caching directives, server info, redirects, and cookie attributes.
HTTP Header Analyzer is a browser-based tool on 24Toolkit. Enter a URL and see all response headers: security headers (CSP, HSTS), caching directives, server info, redirects, and cookie attributes. The HTTP Header Analyzer is a vital utility for web developers, SEO specialists, and system administrators designed to inspect the invisible metadata exchanged between a browser and a server. Whenever you visit a website, your browser sends a request, and the server responds with 'Headers' containing crucial information such as the status code (e.g., 200 OK, 404 Not Found), content type, security policies (CORS, HSTS), and caching directives (Cache-Control). Our tool operates directly in your browser to fetch these headers for any public URL. It allows you to quickly verify if a server is online, check for proper redirection chains, and debug connectivity issues without needing command-line tools like 'curl'.
Key Features
View HTTP response headers
URL analysis
Copy headers
CORS-aware
Free with no limits
How to Use
Enter the URL: Type or paste the full website address (e.g., https://google.com) into the input field.
Start Analysis: Click the 'Analyze Headers' button to initiate a HEAD request to the target server.
Review Status: Instantly see the HTTP Status Code to verify if the site is reachable or redirecting.
Inspect Headers: Browse the list of returned headers to check server types, cookies, and security configurations.
FAQ
Why do I see a 'CORS Error' or limited headers?
This tool runs in your browser. Modern browsers enforce Cross-Origin Resource Sharing (CORS) security policies. If the target website does not explicitly allow your browser to read its headers (via the Access-Control-Expose-Headers header), the browser blocks access to them. This is a security feature of the web, not a bug in the tool.
What information can I learn from HTTP headers?
Headers reveal the server software (e.g., Nginx, Apache), the content type (HTML, JSON), caching rules (how long browsers should save the page), and security settings like X-Frame-Options which prevent clickjacking.
Does this tool track my activity?
No. The request is made directly from your computer to the target website. We do not act as a proxy, so your IP address is the one communicating with the server.