What does a security header checker do?

A security header checker reviews HTTP response headers that help protect a website, including HSTS, Content Security Policy, Last-Modified, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.

Are security headers important?

Yes. Security headers can help reduce risks related to clickjacking, MIME sniffing, insecure HTTP access, referrer leakage, and unsafe browser behavior.

Does a security header checker replace a full security audit?

No. A security header checker is useful for spotting missing browser security headers, but it does not replace a full website security audit.

Free Website Cache Header Tool

Free cache header checker for testing website caching.

Check whether a website is using useful caching headers like Cache-Control, Expires, ETag, Last-Modified, CDN cache status, and related performance headers.

✓ No signup required ✓ Security header report ✓ Built-in abuse protection

How the cache header checker works.

This tool checks a website’s HTTPS response headers and highlights whether common cache headers are present.

Enter a domain

Type a domain like example.com. The tool validates the domain before checking the headers.

Scan cache headers

The checker reads the website’s response headers and looks for cache-related performance signals.

Review cache details

See which cache headers are present, which are missing, and where caching may improve website speed.

Cache headers this tool checks.

These headers help browsers, CDNs, and crawlers understand how website responses can be cached.

HST

Cache-Control

Shows browser and CDN caching rules such as max-age, no-cache, no-store, and public/private.

CSP

ETag

ETag can help browsers validate whether a cached resource has changed.

XFO

Last-Modified

Last-Modified can help browsers and crawlers understand when content was last changed.

Cache header checker FAQ.

Quick answers about Cache-Control, browser caching, CDN cache status, ETag, Expires, and website speed.

What does this cache header checker test?

It checks common HTTP security headers including HSTS, Content Security Policy, Last-Modified, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.

Are missing cache headers bad?

Missing cache headers do not always mean a site is broken, but they can reduce browser caching and make repeat visits slower.

What is Cache-Control?

Cache-Control is an HTTP header that tells browsers and CDNs how a response should be cached.

What is an ETag?

An ETag is a response identifier that helps browsers check whether a cached resource has changed.

Does this replace a full performance audit?

No. This tool checks cache headers only. A full performance audit should also review Core Web Vitals, image optimization, JavaScript, CSS, server response time, and CDN setup.

Can HostDroplet help with faster hosting?

Yes. HostDroplet provides beginner-friendly hosting with SSL support, security-focused setup, backups, and helpful website guidance.

Need hosting with better caching performance?

HostDroplet provides fast, secure, beginner-friendly hosting for WordPress websites, small business sites, blogs, and online projects. Start with hosting that supports SSL, backups, performance, and helpful security guidance.

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