CSP Generator: Build a Content Security Policy

Step-by-step

1. List the first-party and third-party services the website actually uses.
2. Choose the required CSP directives, including default-src, script-src, style-src, img-src, connect-src, and frame-src where applicable.
3. Allow only the origins required by verified resources; avoid broad wildcards or a blanket https: source when a smaller allowlist is possible.
4. Deploy the policy in report-only mode first when your environment supports it, then inspect browser console violations.
5. Adjust specific directives, test key user journeys and integrations, and enforce the policy after validation.

How to troubleshoot CSP violations

A resource can be blocked by different directives depending on whether the browser is loading a script, making a network request, or creating a frame. Add an origin to the directive that governs that resource type, and do not create duplicate directives.

The right result depends on the quality of your input and the requirements of the destination system. Treat generated output as a starting point and confirm it matches your application's documentation, hosting environment, or project requirements.

Common CSP Generator mistakes to avoid

A frequent mistake is copying a result without checking the input, selected options, or assumptions behind it. Review the complete output and confirm that it matches the task you are trying to solve.

• Check input values for missing, malformed, or outdated information.
• Review the output before deploying it or using it in a live workflow.
• Test changes in a safe environment and keep a backup of important configuration.

How to verify the result

Validate the result with the system or service that will consume it. For configuration and security-related changes, test expected behavior as well as failure cases; for SEO and data tasks, confirm that the output is syntactically correct and reflects the source information.