Content Security Policy when running ad scripts
Security headers should reduce risks without silently breaking legitimate website features.
Inspect existing sources
Inventory actual scripts, frames, API calls, fonts, and ad/consent vendor endpoints before authoring directives.
Use staged deployment
Begin with a well-designed report-only evaluation where appropriate; inspect violations and verify features across browsers.
Understand third parties
Advertising scripts may require additional origins and frame access. Avoid copy-pasting restrictive policies that block ads while claiming monetization works.
Recheck after changes
Header tests should cover the consent banner, ad rendering, accessibility tools and mobile interactions.
Try the relevant free tool, then verify any output against actual website behavior and local requirements.
Open related tool →Further references
For European data rights, consult the European Commission guidance. For accessibility, consult W3C WAI evaluation guidance. For advertising consent, check your ad provider’s current publisher requirements.
- European Commission — data protection
- W3C WAI — accessibility evaluation
- Google AdSense — certified CMP requirements
Educational content, not legal advice. Last editorial review: 3 November 2026.