Free Content Security Policy (CSP) Checker
Analyze your site's Content Security Policy for unsafe directives and coverage.
Detect unsafe-inline/unsafe-eval, weak sources, and get best-practice guidance.
- CSP directives analysis
- Detect unsafe-inline/eval
- CSP violation detection
"The ROI has been exceptional. We've prevented three potential security incidents in the first quarter alone, and the platform pays for itself in risk mitigation."
— Elena Rodriguez
VP of Engineering
"We identified and fixed critical vulnerabilities before our platform launch, saving us from potential data breaches."
— Marcus Anderson
CTO
"Implementation was seamless and continuous monitoring gives our team confidence. We've seen a 40% reduction in security incidents since adopting Barrion."
— David Kim
Chief Security Officer
"The automated scanning and detailed reporting have transformed our security posture. We've reduced our vulnerability remediation time from weeks to days."
— Priya Sharma
Security Director
"Barrion's passive scanning approach means zero impact on our production systems while providing security insights. Perfect for our high-traffic environment."
— Robert Taylor
DevOps Lead
"The reporting feature saved us weeks of manual work during our SOC 2 audit. The automated report generation is a game-changer."
— Michael Brown
Compliance Officer
"Barrion's security scanning has helped us implement best security practices efficiently, saving us countless hours."
— Sarah Chen
Head of Security
"Barrion gives us peace of mind, knowing we're notified of any security issues. Exactly what our team needed."
— Oskar Nilsson
Tech Lead
"The detailed vulnerability reports and remediation guidance have been invaluable. Our development team can now address issues proactively rather than reactively."
— Amanda Foster
Engineering Manager
"Barrion's real-time alerts have helped us catch and fix vulnerabilities before they become critical issues. The peace of mind is worth every penny."
— Jennifer Martinez
Security Architect
"We needed a solution that could scale with our growing infrastructure. Barrion has exceeded expectations and become an essential part of our security toolkit."
— Lisa Wang
Infrastructure Director
Scan in three simple steps
Fast, safe, non-intrusive checks with actionable results.
Start scan
Enter your URL, and click the start scan button to begin.
Scan runs
Barrion performs passive, read-only security checks with minimal site impact.
Take Action
Fix issues with step-by-step guidance and enable monitoring for continuous protection.
What is Content Security Policy (CSP)?
CSP is a browser security layer that controls where your app can load resources from (scripts, styles, images, frames, etc.). A strict policy prevents XSS and reduces supply‑chain risk by blocking unexpected sources.
Why CSP matters
A strong CSP can neutralize whole classes of injection bugs and mitigate third‑party script risk. It also provides defense in depth when combined with escaping, sanitization, and Trusted Types.
What this checker validates
- Detects unsafe directives (unsafe-inline, unsafe-eval)
- Flags missing baselines: object-src 'none', base-uri 'none'
- Evaluates nonce/hash usage and recommends strict-dynamic
- Reviews frame-ancestors, form-action, upgrade-insecure-requests
- Monitors CSP console errors to identify blocked legitimate resources
How to fix common failures
- Replace script-src 'unsafe-inline' with nonces (rotate per request)
- Add object-src 'none'; base-uri 'none'; form-action 'self'
- Audit third‑party domains and restrict to explicit allow‑lists
- Enable upgrade-insecure-requests and avoid mixed content
Examples (good vs bad)
Bad: script-src 'self' 'unsafe-inline' https://cdn.example.com
Better: script-src 'self' 'nonce-...' 'strict-dynamic' https://cdn.example.com; object-src 'none'; base-uri 'none'
Tool-specific questions
Should I use nonces or hashes?
Do I need object-src and base-uri even if unused?
Can I allow *.cdn.com wildcards?
How often should CSP nonces rotate?
How do I migrate from unsafe-inline to nonces?
Why do third-party widgets get blocked?
Does Barrion detect CSP console errors?
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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