CSP Header Validator
Validate Content-Security-Policy headers, check directives, and find security risks.
Paste a CSP header value above
We will validate directives and check for security risks
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CSP Validation: Check Content Security Policy Headers for Errors
Learn how to validate Content Security Policy headers and avoid common security misconfigurations.
What Is CSP Validation?
Content Security Policy (CSP) validation checks whether your CSP header or meta tag correctly defines which resources the browser is allowed to load. A misconfigured CSP can either block legitimate resources, breaking your site, or be too permissive, leaving security gaps.
5 min readRead full guide