Content Security Policy Builder
Visually build CSP headers with preset templates, per-directive controls, validation warnings, strictness scoring, and report-only mode.
Content Security Policy Builder
Visually build Content Security Policy headers with preset templates, per-directive controls, validation warnings, and strictness scoring.
Preset Templates
Use Content-Security-Policy-Report-Only header (monitors violations without enforcing)
0 directives enabled
Directives
Frequently Asked Questions
What is CSP?
An HTTP header controlling which resources a browser can load, preventing XSS and data injection attacks.
Enforced vs report-only?
Enforced blocks violations. Report-only allows them but reports — useful for testing before enforcement.
Why avoid unsafe-inline/eval?
unsafe-inline allows exploitable inline scripts. unsafe-eval enables dynamic code execution. Both significantly weaken CSP protection.
Is the Content Security Policy Builder free to use?
Yes, the Content Security Policy Builder is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Does the Content Security Policy Builder work on mobile devices?
Yes, the Content Security Policy Builder is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Content Security Policy Builder in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the Content Security Policy Builder?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Content Security Policy Builder works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Content Security Policy Builder
Content Security Policy Builder is a free, browser-based tool in our Website Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.