HTTP Headers Checker – Inspect HTTP Response Headers Free
Inspect HTTP response headers for any URL. Check security headers, cache headers, content type, and server information. Free HTTP headers tool.
Frequently Asked Questions
HTTP headers are metadata sent with every web request and response. They control caching, security policies, content types, and more. Security headers like Content-Security-Policy and Strict-Transport-Security help protect your site from attacks.
HSTS tells browsers to only connect to your site over HTTPS. Once set, browsers will refuse HTTP connections for the specified duration. This prevents protocol downgrade attacks.
The X-Powered-By header reveals what backend technology you're using (e.g. PHP, ASP.NET). This information can help attackers target known vulnerabilities. Remove it in your server configuration.
CSP is a powerful security header that tells the browser which sources are allowed to load scripts, images, styles, and other resources. It significantly reduces the risk of XSS attacks.
Browser CORS restrictions prevent directly reading all response headers from client-side JavaScript. Some headers may not be visible. Use a server-side tool like curl for complete header inspection.
What is HTTP Headers Checker – Check Security Headers Free Online?
An HTTP headers checker fetches the HTTP response headers returned by a web server for any URL. Response headers contain important information about security settings, caching behavior, content type, server software, and redirects. Our tool displays all headers in a readable format with explanations of the most important security and SEO-relevant headers.
How to Use HTTP Headers Checker – Check Security Headers Free Online
- 1Enter the URL you want to inspect.
- 2Click Check Headers to fetch the response headers.
- 3Review all HTTP response headers.
- 4Check for important security headers (HSTS, CSP, X-Frame-Options).
- 5Note any missing headers that should be configured.
Key Features
- ✓All HTTP response headers displayed
- ✓Security header analysis (HSTS, CSP, X-Frame-Options, etc.)
- ✓HTTP status code
- ✓Redirect chain detection
- ✓Cache-Control and Expires header analysis
Benefits
- →Audit security header configuration
- →Check if caching is properly configured
- →Verify content type is set correctly
- →Identify redirect issues
- →Debug server configuration problems
Why Use Irreva for HTTP Headers Checker – Check Security Headers Free Online?
Frequently Asked Questions
What are HTTP response headers?
HTTP response headers are key-value pairs sent by a web server with every HTTP response. They provide information about the server, content, caching rules, security policies, and more.
What security headers should every website have?
Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy are the most important security headers for modern websites.
What does the HTTP status code mean?
200 means success, 301/302 are redirects, 404 means not found, 403 means forbidden, and 500 means server error. The status code is the first thing to check when debugging a URL.
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