Free Security Headers Checker

Comprehensive HTTP security headers analysis including CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COEP/COOP/CORP, and clickjacking protection.

Validate your website's security header configuration against modern best practices.

  • Content Security Policy
  • X-Frame-Options
  • X-Content-Type-Options
  • Permissions Policy
  • Referrer Policy
  • And more...
Scan Now - Free
No credit card requiredNon-intrusive scanningNo setup required
★★★★★

"Barrion's security scanning has helped us implement best security practices efficiently, saving us countless hours."

Sarah Chen

Head of Security

★★★★★

"We identified and fixed critical vulnerabilities before our platform launch, saving us from potential data breaches."

Marcus Anderson

CTO

★★★★★

"Barrion gives us peace of mind, knowing we're notified of any security issues. Exactly what our team needed."

Oskar Nilsson

Tech Lead

Enterprise-Grade Security
Trusted Worldwide
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How it works

Scan in three simple steps

Fast, safe, non-intrusive checks with actionable results.

1

Start scan

Enter your URL, and click the start scan button to begin.

2

Scan runs

Barrion performs passive, read-only security checks with minimal site impact.

3

Take Action

Fix issues with step-by-step guidance and enable monitoring for continuous protection.

What are security headers?

HTTP security headers configure browser behavior to reduce risk from XSS, clickjacking, mixed content, and cross-origin leaks.

How to fix common issues

  • Set X-Content-Type-Options: nosniff
  • Adopt a strict CSP with nonces/hashes
  • Enable HSTS with preload readiness

What this test checks

Content Security Policy (CSP):
  • CSP directive configuration and syntax validation
  • Detection of unsafe-inline and unsafe-eval usage
  • Nonce and hash implementation guidance
  • Frame-ancestors directive for clickjacking protection
Clickjacking Protection:
  • X-Frame-Options header presence and configuration
  • CSP frame-ancestors directive validation
  • Frame embedding restrictions and policy consistency
Content Type & MIME Security:
  • X-Content-Type-Options: nosniff implementation
  • MIME type sniffing protection validation
  • Content-Type header configuration
Privacy & Referrer Control:
  • Referrer-Policy header configuration
  • Cross-origin referrer information control
  • Privacy-preserving referrer policies
Feature Permissions:
  • Permissions-Policy header validation
  • Browser API access restrictions (camera, geolocation, etc.)
  • Feature policy best practices compliance
Cross-Origin Security:
  • Cross-Origin-Embedder-Policy (COEP) configuration
  • Cross-Origin-Opener-Policy (COOP) validation
  • Cross-Origin-Resource-Policy (CORP) settings
Information Disclosure:
  • Server header exposure and version disclosure
  • X-Powered-By header detection
  • Technology stack information leakage
Transport Security:
  • HTTP Strict Transport Security (HSTS) configuration
  • HSTS preload readiness validation
  • HTTPS enforcement policies

Tool-specific questions

What's the difference between X-Frame-Options and CSP frame-ancestors?

CSP frame-ancestors is the modern standard and more flexible than X-Frame-Options. It allows granular control over which domains can embed your content. X-Frame-Options is legacy but still widely supported. Use CSP frame-ancestors for new implementations and ensure consistency across your site.

How do I implement a secure Content Security Policy without breaking my site?

Start with a report-only CSP to identify issues, then gradually implement directives. Use nonces for inline scripts, avoid unsafe-inline and unsafe-eval, and implement proper source whitelisting. Test thoroughly in staging before deploying to production.

Why is Permissions-Policy important for web security?

Permissions-Policy controls access to powerful browser APIs like camera, microphone, geolocation, and payment APIs. By restricting these features to trusted origins only, you prevent malicious scripts from accessing sensitive user data and reduce your attack surface significantly.

What are the benefits of implementing Cross-Origin policies (COEP/COOP/CORP)?

Cross-Origin policies enable cross-origin isolation, which provides stronger security guarantees and access to powerful APIs like SharedArrayBuffer. COEP controls resource embedding, COOP isolates browsing contexts, and CORP controls resource loading. Together they create a secure cross-origin environment.

How often should I review and update my security headers?

Review security headers after any major site changes, new feature deployments, or security updates. Use Barrion's continuous monitoring to track header changes over time. Security headers should be treated as part of your security baseline and reviewed quarterly at minimum.

What's the impact of missing X-Content-Type-Options: nosniff?

Without nosniff, browsers may perform MIME type sniffing, potentially interpreting files as different types than intended. This can lead to XSS attacks if malicious content is served with incorrect MIME types. Always set X-Content-Type-Options: nosniff to prevent this behavior.

Why Choose Barrion?

Real-Time Results

Instant security analysis with detailed reports, giving you an immediate security overview

Comprehensive Checks

Multiple best-practice security checks in a single scan, for broad coverage

Actionable and Effective

Clear recommendations for fixes, helping you improve your security quickly and effectively

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TLS/SSL Security Checker

Validate your SSL/TLS configuration and certificate setup

  • HTTPS verification
  • HSTS check
  • TLS version check
  • Cipher suite analysis
  • Mixed content detection

Content Security Policy (CSP) Checker

Analyze your CSP for unsafe directives and strengthen your policy with best practices.

  • CSP directives analysis
  • Detect unsafe-inline/eval
  • Nonce/Hash guidance

CORS Policy Checker

Validate Access-Control headers, credentials safety, and simulate preflight requests.

  • ACAO configuration
  • Preflight simulation
  • Credentials safety

Cookie Security Checker

Audit HttpOnly, Secure, SameSite and Partitioned cookie attributes for safety.

  • HttpOnly & Secure flags
  • SameSite settings
  • Partitioned cookies

Referrer Policy Checker

Validate Referrer-Policy and apply privacy-preserving safe defaults.

  • Referrer-Policy detection
  • Safe defaults
  • Copyable examples
Browse all tools

General questions

Frequently Asked Questions

Find answers to common questions about Barrion.
If you have any other questions, feel free to reach out!

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