Generate robust Content Security Policy (CSP) headers for your website. Configure script-src, connect-src, and more with our free, easy-to-use browser tool.
AI Generation Prompt
Content Security Policy (CSP) Header Builder
A professional-grade, browser-based utility designed for web developers to construct, validate, and export Content Security Policy (CSP) headers. This tool simplifies the complex syntax of security headers into a clean, interactive user interface.
Core Features
- Directive Toggle System: A modular list of all major CSP directives (e.g.,
script-src,style-src,img-src,connect-src,frame-ancestors). - Source Configuration: Each directive allows users to add multiple sources (e.g.,
'self','unsafe-inline', specific domains, protocols likehttps:). - Real-time Syntax Validation: The tool provides instant feedback if a directive or source is improperly formatted.
- One-Click Export: Copy the generated header string directly to your clipboard for immediate implementation in web server configurations (Apache, Nginx, or meta tags).
- Preset Templates: Quick-start buttons to load "Strict/High Security" or "Permissive/Development" default profiles.
- Zero-Storage Architecture: No persistence mechanisms are used. State is handled entirely in memory.
UI/UX Design Specification
- Layout: A two-column split-screen layout on desktop. The left panel contains the configuration form (accordion style); the right panel acts as a "sticky" code viewer showing the generated policy.
- Palette: A clean, professional light-mode aesthetic using shades of slate, white, and a vibrant primary blue for call-to-action buttons.
- Primary:
#2563eb(Blue) - Background:
#f8fafc(Light Slate) - Text:
#1e293b(Dark Slate) - Borders:
#e2e8f0
- Primary:
- Typography: Sans-serif, system-ui font stack (Inter or similar) for high readability.
- Animations: Subtle transition effects on hover states for buttons and smooth entry animations for new directive rows being added.
Technical Implementation Constraints
- Frameworks: Pure HTML5, CSS3, and Vanilla JavaScript. Tailwind CSS (via CDN) is permitted for styling.
- State Management: All configuration data must be held in a standard JavaScript object within a single memory scope.
- Storage: Explicitly banned. Do not use
localStorage,sessionStorage, or cookies to save progress. - Security: Use custom modal UI elements for any confirmation or alerts—no browser-native
alert()orconfirm(). - Responsive Behavior: On mobile screens, the layout must stack vertically, with the configuration form appearing above the output pane. The output pane should be collapsible to save screen space.
- Compatibility: Ensure the app handles null-origin iframe environments by avoiding any code that attempts to access
window.localStorageor parent-window restricted APIs.
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Frequently Asked Questions
Everything you need to know about using this application.
What is a Content Security Policy (CSP)?
A Content Security Policy is an HTTP header that allows site administrators to declare approved sources of content that browsers are allowed to load on that page. It helps mitigate cross-site scripting (XSS) and data injection attacks.
Why use an online CSP generator?
Constructing CSP strings manually is error-prone due to complex syntax requirements. An online generator provides a structured user interface to toggle directives, specify sources, and export valid policy strings instantly.
Does this tool store my generated policies?
No. This tool runs entirely in your browser using client-side memory. Your configuration is not sent to any server, nor is it stored in cookies or browser storage, ensuring complete privacy.
