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Dev.to
7/11/2026
CSP Builder: a small tool that solves a specific problem

CSP Builder: a small tool that solves a specific problem

Short summary

CSP Builder is a free, browser-based visual generator for Content Security Policy headers, part of the DevTools collection of 200+ utilities. Users compose directives like default-src and script-src through a form interface with quick-add buttons for common sources, real-time preview, and a toggle between enforcement and report-only modes. The tool runs entirely client-side with no signup, making it useful for developers who need correct CSP headers without memorizing RFC syntax.

  • •Visual form-based CSP header generator with real-time preview
  • •Supports enforcement and report-only modes for safe testing
  • •Part of a free 200+ DevTools browser utility suite, no signup required

Generated with AI, which can make mistakes.

#open-source
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