Free HTTP Security Headers Checker
Check whether your site actually sends the HTTP response headers that force browsers to enforce HTTPS, block clickjacking, and stop injected-script attacks. Free, one URL, no login.
Most sites are missing headers they don’t know exist
HTTPS alone does not make a site secure. The browser only enforces HTTPS-only connections, blocks clickjacking frames, stops MIME-sniffing attacks, and locks down risky script execution if the server actually sends the response headers that tell it to. Most sites we audit are missing at least half of them, usually because whoever set up hosting or the CDN never had a reason to add them. For regulated-industry intake and application forms — healthcare, financial services, political fundraising — missing headers aren’t just a technical gap, they’re a real data-exposure risk.
This free check fetches your page and inspects the actual HTTP response headers — the same six checks we run before any client site goes live — so you know exactly what is missing before it becomes a real exposure.
- No Content-Security-Policy header found — leaves the site with no browser-level defense against injected or malicious scripts.
Sample result using example data — enter your own details below to get your real score.
Free HTTP Security Headers Checker
Drop in any live URL. We will fetch the page and check its HTTP response headers for the browser-side protections a modern site should ship by default — HSTS, Content Security Policy, clickjacking and MIME-sniffing protection, referrer and permissions policy — free, no login required.
Fetching your page and checking its HTTP security headers…
The Four Scoring Categories
- Transport Security (HSTS)
- Whether the site sends a Strict-Transport-Security header telling browsers to only ever connect over HTTPS, for long enough, across every subdomain.
- Content Security Policy
- Whether the site defines an allowlist of what scripts and content are allowed to run, and whether that policy has been weakened with unsafe exceptions.
- MIME-Sniffing & Clickjacking Protection
- Whether the site blocks browsers from guessing file types in unsafe ways, and whether it stops the page from being embedded in someone else’s malicious frame.
- Referrer & Permissions Policy
- Whether the site controls how much of your URL leaks to other domains via the referrer, and whether it restricts unnecessary access to camera, mic, and location.
Training option
Learn the framework first
Not ready to hire an agency yet? Start with Tridigiam Marketing Academy, a $20/month membership for regulated and approval-sensitive teams that want practical SEO, GEO, AEO, and AI visibility training.
The membership currently includes AI Search Optimization for Regulated Businesses and AI Visibility Audit Lab for Regulated Businesses. Together, they walk through the same SEO, GEO, AEO, schema, trust-signal, AI visibility monitoring, and compliance-safe workflow principles behind this service, plus templates, prompts, scorecards, checklists, and implementation trackers.
Use it to understand the framework, train your team, or prepare for a stronger strategy conversation with Tridigiam.
Key Terms
- HSTS (HTTP Strict Transport Security)
- A header that forces browsers to only connect to a site over HTTPS, blocking downgrade attacks to plain HTTP.
- CSP (Content Security Policy)
- A header that restricts which scripts, styles, and resources a browser is allowed to load, reducing the risk of cross-site scripting.
- X-Frame-Options
- A header that controls whether a page can be embedded in an iframe on another site, helping prevent clickjacking.
- Referrer-Policy
- A header that controls how much URL information a browser sends to other sites when a visitor clicks a link away from the page.
- Permissions-Policy
- A header that lets a site turn off browser features, like camera or microphone access, for itself and any embedded content.
Security Headers Checker FAQ
Is this a real penetration test?
No, and we want to be very clear about that. This is a header-inspection check, not a penetration test. It reads the HTTP response headers your server sends on the one page fetched and does not attempt to exploit anything, does not scan for vulnerabilities beyond header configuration, and is not a substitute for a real security audit.
What exactly does it check?
It checks six response headers across four categories: Strict-Transport-Security (HSTS), Content-Security-Policy (including whether it has been weakened with unsafe exceptions), X-Content-Type-Options, X-Frame-Options and CSP frame-ancestors, Referrer-Policy, and Permissions-Policy.
Why do security headers matter for a small business?
These headers are what turn on browser-side protections against some of the most common attacks: forcing HTTPS on every future visit, blocking your site from being embedded in a malicious frame, and stopping injected scripts from running. Most are a five-minute server or CDN configuration change once you know what is missing.
Can this replace a real security audit?
No. This checks header configuration on one page at one moment in time. It does not test for vulnerabilities in your code, your plugins, your server software, or your infrastructure. Use it as a fast first pass, then bring in a real security review for anything client data or payment related.
Can I check a page that requires a login?
No. The tool can only read pages that are publicly reachable, and it blocks local and internal addresses for security reasons.
Is this really free?
Yes. Enter a URL and your email, and you get your results immediately. No credit card and no sales call required to see your score.
What do you do with my URL and email?
Your URL is used only to fetch and score that one page and is not stored beyond your result. Your email is used to send your results and, occasionally, related site-security content. You can unsubscribe at any time.
What if my score comes back as high risk?
A high-risk score usually points to a specific, fixable header that is simply missing, most often HSTS or Content-Security-Policy. Your results include a plain-English list of what was flagged in each category, and you are welcome to book a free strategy call if you want help prioritizing fixes.
Resources & References
Primary sources for the response headers this checker scans for.
Built and reviewed by Chris Goodman, CEO of Tridigiam
Founder of a Las Vegas marketing agency building AI-visibility and compliance-aware marketing systems for regulated industries — healthcare, addiction treatment, and aesthetics. LinkedIn
Related Free Tools
Security headers are one piece of overall technical trust — pair with these two.
- URL Canonicalization & Redirect Consistency Checker — both are quick, no-login technical-health passes worth running back to back.
- Sitemap & Robots.txt Health Checker — foundational crawl and security checks that belong in the same technical-audit pass.
- Email Authentication Checker — SPF/DKIM/DMARC and HTTP security headers are both invisible trust signals that browsers and mail servers check silently.
Built by an agency that treats security headers as standard practice, not an afterthought
Tridigiam builds and manages websites for small businesses, healthcare practices, and political campaigns alike. HSTS, CSP, and clickjacking protection aren’t a one-time cleanup, they’re part of how every page gets built and maintained from day one.
If your score flags something real, or you want help configuring headers correctly at your server or CDN without breaking anything, a strategy call is free and there is no obligation.
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