HTTP Security Headers Policy Builder
Processed in your browser
Interactive builder for Content-Security-Policy (CSP), HSTS, X-Frame-Options, and Referrer-Policy with copyable Nginx & Apache directives.
Policy Directives
Generated Server Config
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Direct In-Browser Handoff
HTTP API & Protocol Diagnostics Suite
Chain this tool with complementary private browser utilities for a complete zero-server workflow:
HTTP Content Security Policy (CSP) Header Builder
Network & Internet Tools · Processed in your browser
HSTS Preload & Strict-Transport-Security Validator
Network & Internet Tools · Processed in your browser
CORS Headers Configuration Builder
Network & Internet Tools · Processed in your browser
Helpful Examples
Strict Modern HTTPS Site
CSP + HSTS + Deny Frame
Modern StrictHow to Use the HTTP Security Headers Policy Builder
Client-side HTTP security headers configuration suite. Generate robust web server response headers (Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options, Permissions-Policy) to protect web applications against Cross-Site Scripting (XSS), clickjacking, and MIME sniffing attacks.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
What is Content-Security-Policy (CSP)?
CSP is an HTTP header that allows site operators to restrict the resources (JavaScript, CSS, Images) that the browser is allowed to load for a given page, neutralizing XSS vulnerabilities.
What does HSTS (Strict-Transport-Security) do?
HSTS instructs modern browsers to only connect to the domain using secure HTTPS connections for a specified duration (`max-age`), preventing SSL-stripping man-in-the-middle attacks.
Related Utilities
Frequently paired browser tools in Network & Internet Tools