Content Security Policy Builder
Network & Ops · Free Online Tool
Visually compose CSP header directives.
Fallback for other resource types.
JavaScript sources.
Stylesheet sources.
Image sources.
Font sources.
Fetch, WebSocket, EventSource targets.
Audio/video sources.
Plugin objects (e.g. Flash).
iframe / frame sources.
Allowed <base> URIs.
Allowed form submission targets.
Parents that may embed this page (anti-clickjacking).
Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';
All Directives
Includes default-src, script-src, frame-ancestors, and more.
Live Preview
Header updates as you type — leave a field empty to omit the directive.
Copy or Download
Export the header to clipboard or as a text file for your server config.
How to Use Content Security Policy Builder
- 1Enter the URL, IP address, or network parameter to look up.
- 2Click the lookup or test button.
- 3Review the detailed results in the output panel.
- 4Use the information for your network operations.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
Are network lookups real-time?
Yes, IP lookups, DNS queries, and HTTP tests perform live network requests to provide current data.
Is my IP address logged?
The IP Lookup tool queries public geolocation APIs. We do not store your IP address or lookup history.
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Parse browser, OS, and device from UA string.
HTTP Status Codes
Reference for all HTTP status codes.
HTTP Request Tester
Send GET/POST/PUT/DELETE requests and inspect responses.
Learn the concept
Learn the concept
Understand the programming ideas behind this tool.