HTTP & Security Headers
Inspect server response codes, latency, redirects, and test for essential HTTP security headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options).
Enter Target URL
Type the website URL or domain (e.g. https://example.com).
Execute HTTP Inspection
Our server performs an automated HEAD/GET request with standard user-agent headers.
Review Security Audit
Analyze status code, latency, server software, and security policy coverage.
Instantly checks for HSTS, Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options.
Accurately measures TTFB (Time To First Byte) and response times in milliseconds.
Inspect every response header key returned by Nginx, Apache, Cloudflare, or AWS.
- Always enable HSTS with 'includeSubDomains; preload' once your SSL certificate is stably configured across all subdomains.
- Remove 'Server' and 'X-Powered-By' response headers in production to avoid advertising your backend software versions to attackers.
Frequently Asked Questions about HTTP Headers
Helpful answers to common questions about checking username availability, domain extensions, and registration.
What are HTTP response headers?
HTTP response headers are metadata key-value pairs returned by a web server alongside requested web pages or API responses. They specify content type, caching rules, security policies, cookies, and server environment details.
Why is the Strict-Transport-Security (HSTS) header important?
HSTS instructs modern browsers to only interact with your domain over secure HTTPS connections, preventing man-in-the-middle attacks and cookie-stripping vulnerabilities.
What is a Content Security Policy (CSP)?
CSP is a powerful security header that restricts which scripts, styles, images, and external origins your web page is allowed to load. It provides strong defense against Cross-Site Scripting (XSS) and data injection attacks.
What does X-Frame-Options do?
X-Frame-Options tells browsers whether your page can be embedded in an iframe, frame, or embed tag. Setting it to 'DENY' or 'SAMEORIGIN' protects users against clickjacking attacks.
How can I check response latency and HTTP status codes?
This tool performs a real-time HTTP fetch to measure round-trip response time in milliseconds, HTTP status code (200, 301, 302, 404, 500), and inspects redirect chains.