CSP Header Generator
Build Content Security Policy HTTP headers with a visual editor. Configure script-src, style-src, img-src, connect-src, and other directives with nonces and hashes.
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About CSP Header Generator
Generate Content Security Policy Headers the Right Way
Content Security Policy headers are one of the most effective defenses against cross-site scripting attacks, clickjacking, and other code injection vulnerabilities. But writing CSP headers by hand is tedious, error-prone, and confusing — even for experienced developers. The CSP Header Generator provides an interactive interface where you configure your policy visually and get a correctly formatted header ready to deploy.
If you have ever stared at a wall of CSP directives wondering whether you need unsafe-inline or script-src-attr, this tool is for you.
How the CSP Header Generator Works
The tool presents each CSP directive as a configurable option. Start with the most common ones: default-src sets the fallback policy for all resource types. script-src controls where JavaScript can load from. style-src governs CSS sources. img-src defines allowed image origins. connect-src restricts fetch, XMLHttpRequest, and WebSocket connections.
For each directive, you can allow specific domains, use keywords like self and none, enable or disable unsafe-inline and unsafe-eval, and add nonce or hash-based exceptions. The CSP Header Generator validates your selections and warns you about configurations that weaken security, like allowing unsafe-inline on script-src without a nonce.
Once configured, the tool outputs the complete header in the correct format for your web server. It provides copy-paste snippets for Apache htaccess, Nginx config files, meta tags, and programmatic headers in PHP, Node.js, and Python.
Why Every Website Needs a CSP Header
Cross-site scripting remains one of the top web security vulnerabilities year after year. A properly configured CSP header prevents attackers from injecting malicious scripts even if they find an XSS vulnerability in your application. It acts as a safety net that stops unauthorized code from executing in your users' browsers.
Without a CSP header, browsers allow scripts from any source by default. That means a single XSS flaw can load cryptocurrency miners, credential stealers, or redirect scripts from attacker-controlled domains. The CSP Header Generator helps you lock this down with minimal effort.
Who Should Use This Tool?
Web developers building or maintaining any public-facing website need CSP headers. Whether you are working on a personal blog, an e-commerce platform, or a SaaS application, CSP is a baseline security requirement that modern browsers fully support.
DevOps engineers configuring web servers and reverse proxies use the CSP Header Generator to produce headers without memorizing directive syntax. The tool's server-specific output snippets save time during deployment.
Security auditors and penetration testers use it to generate recommended CSP policies as part of their findings reports. Instead of describing the policy in prose, they provide a ready-to-deploy header.
WordPress and CMS administrators who are not full-time developers but want to improve their site's security posture find the visual interface much more approachable than reading CSP specification documents.
Common CSP Mistakes the Tool Prevents
Using unsafe-inline without understanding the implications is the most common error. It effectively disables CSP protection against inline script injection, which is the most common XSS attack vector. The CSP Header Generator highlights this risk and suggests nonce-based alternatives.
Overly permissive wildcard domains like *.example.com sometimes include subdomains you did not intend to trust. The tool warns you when wildcards might be too broad.
Forgetting the default-src directive means any resource type without an explicit rule falls back to the browser's default permissive behavior. The generator ensures default-src is always set as a foundation.
Conflicting directives that override each other silently are caught by the tool's validation logic before you deploy a policy that does not work as intended.
Tips for CSP Deployment
Start with report-only mode. The CSP Header Generator can output a Content-Security-Policy-Report-Only header that logs violations without blocking resources. Deploy this first, monitor the reports, and tighten the policy before switching to enforcement mode.
Test thoroughly after deploying. CSP can break legitimate functionality if configured too strictly. Third-party widgets, analytics scripts, and font services all need explicit allowlisting.
Secure Your Site in Minutes
Open the CSP Header Generator above, configure your policy visually, and deploy a robust Content Security Policy that protects your users from injection attacks.