How to use Content Security Policy Tester
- Enter or paste your text into the input field to begin.
- Adjust the Content-Security-Policy, Resource URLs (one per line) options to match what you need.
- The result is computed live in your browser as you edit the input.
- Use Copy to keep or reuse the result.
About this tool
Content Security Policy Tester is a static, client-side tool with no backend. Content Security Policy Tester handles your input locally and returns the result instantly, with no sign-up.
Because it runs on your device, it is fast and private and works offline once loaded. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
How do I use Content Security Policy Tester?
Content Security Policy Tester runs entirely on your device: add your input using the Content-Security-Policy, Resource URLs (one per line) controls, and it checks it locally in real time.
Do I need an account for Content Security Policy Tester?
No — Content Security Policy Tester needs no account, sign-up or installation.
Does Content Security Policy Tester upload my data?
No — Content Security Policy Tester processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can I use Content Security Policy Tester without a connection?
Yes — after the first load Content Security Policy Tester runs entirely offline.