How to use Content Security Policy Checker
- Type or paste your text into Content Security Policy Checker's input area.
- Adjust the Paste a Content-Security-Policy header or policy option to match what you need.
- The result is computed live in your browser as you edit the input.
- Finish by choosing Copy to take the output with you.
About this tool
Content Security Policy Checker runs entirely in your browser. Content Security Policy Checker is a free HTTP & Security Header Tools utility that runs in your browser, doing its work on the input you provide without a backend.
It is designed to do one job well and stay out of your way. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does Content Security Policy Checker do?
Content Security Policy Checker runs entirely on your device: add your input using the Paste a Content-Security-Policy header or policy control, and it checks it locally in real time.
Does Content Security Policy Checker cost anything?
No — Content Security Policy Checker is completely free, with no sign-up and no hidden limits.
Does Content Security Policy Checker upload my data?
No — Content Security Policy Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can I use Content Security Policy Checker without a connection?
Yes — after the first load Content Security Policy Checker runs entirely offline.