Content Security Policy (CSP) Header Generator — Prevent XSS & Code Injection Attacks with Professional HTTP Header Configuration

The Content Security Policy (CSP) Header Generator is a professional security tool designed to help web developers create robust, secure HTTP headers that prevent Cross-Site Scripting (XSS), code injection attacks, and other malicious script execution. By defining granular policies for which dynamic resources are allowed to load on your site, you can significantly harden your website's security posture and reduce vulnerability surface area. This interactive tool lets you configure CSP directives for scripts, styles, images, fonts, frames, and other resource types, then generates the exact code needed for your Nginx, Apache, or other server configuration.

Key Features:

• Interactive CSP policy builder — configure directives for scripts, styles, images, fonts, frames, and other resource types without manual coding • Multi-directive support — set policies for script-src, style-src, img-src, font-src, frame-src, connect-src, and additional CSP directives • Server configuration export — generate ready-to-use header code for Nginx, Apache, and other web servers • Policy validation — verify your CSP syntax before deployment to catch configuration errors • Report-only mode — test policies in report-only mode to identify potential violations without blocking content • Best practice templates — start with pre-configured CSP templates for common security scenarios

How It Works:

• Paste or build your Content Security Policy by selecting allowed sources and directives for each resource type • Configure trusted domains and protocols (e.g., https://, cdn.example.com) that are permitted to load resources • Choose between strict policies (more restrictive, highest security) and flexible policies (broader resource access) • Enable nonce and hash-based policies for inline scripts and styles when needed • Generate the exact HTTP header code for your server configuration (Nginx location block, Apache .htaccess, or IIS web.config) • Test your policy in report-only mode to identify legitimate resources that might be blocked before enforcing

Common Use Cases:

• Protecting against Cross-Site Scripting (XSS) attacks by restricting script execution to trusted sources only • Preventing code injection attacks and malware distribution through compromised third-party resources • Hardening e-commerce sites, financial applications, and healthcare portals that handle sensitive data • Implementing defense-in-depth security for SaaS applications and user-facing web platforms • Meeting compliance requirements (PCI DSS, HIPAA, GDPR) that mandate additional security hardening measures • Reducing security incident response time by blocking malicious scripts before they execute • Debugging content loading issues by analyzing CSP violation reports and refining policy rules

Privacy & Performance:

• All CSP header generation is performed locally on your browser — no data is transmitted to external servers • Zero logging of your policies or configuration details — your security strategies remain confidential • Lightweight tool with no performance impact on your website or network • CSP headers are processed by browsers with minimal overhead and improve overall site security without slowing content delivery • Compatible with all modern browsers (Chrome, Firefox, Safari, Edge) and legacy browsers that support CSP Level 2