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View and test Content Security Policy headers on any website. Decode existing CSPs or inject your own for testing. IntegSec CSP Tester - View and Test Content Security Policies Transform your browser into a powerful Content Security Policy (CSP) analysis and testing tool. IntegSec CSP Tester is the ultimate extension for web developers, security professionals, and site administrators who need to understand, analyze, and test CSP headers on any website. 🔒 WHAT IS CONTENT SECURITY POLICY? Content Security Policy (CSP) is a critical web security standard that helps prevent cross-site scripting (XSS) attacks, data injection attacks, and other code injection vulnerabilities. CSP works by allowing website owners to specify which sources the browser should consider valid for loading resources like scripts, stylesheets, images, fonts, and more. Without proper CSP configuration, websites are vulnerable to Cross-Site Scripting (XSS) attacks, data injection attacks, clickjacking attempts, unauthorized resource loading, and mixed content vulnerabilities. 🎯 WHY USE INTEGSEC CSP TESTER? Whether you're a developer implementing CSP for the first time, a security professional auditing websites, or a site administrator troubleshooting policy violations, IntegSec CSP Tester provides the tools you need to work effectively with Content Security Policies. KEY FEATURES: 👁️ VIEW MODE - AUTOMATIC CSP ANALYSIS The extension automatically detects and analyzes CSP headers on any website you visit. No configuration needed - just browse and learn! • Automatic Detection: Instantly identifies CSP headers from HTTP responses and meta tags • Plain English Explanations: Every directive is explained in clear, understandable language • Security Scoring: Get an instant security rating (0-5) for any CSP configuration • Criticality Assessment: Understand if a CSP is Excellent, Good, Moderate, Weak, or Critical • Directive Breakdown: See exactly what each directive allows and why it matters • Raw Header Display: View the exact CSP header as sent by the server Perfect for security audits, learning how CSP works, understanding competitor security configurations, troubleshooting CSP-related issues, and compliance reviews. 🧪 TEST MODE - INJECT AND TEST YOUR CSP Test your CSP configurations before deploying them to production. This powerful feature lets you inject custom CSP headers into any website to see how they behave. • Custom CSP Injection: Paste any CSP policy and inject it into web requests • Real-Time Testing: See CSP violations immediately in the browser console • Toggle On/Off: Enable or disable CSP injection with a single click • Clipboard Integration: Easily paste CSPs from our builder tool • Cross-Site Testing: Test your CSP on any website, not just your own • Violation Reporting: View detailed violation reports in DevTools console Perfect for testing CSP configurations before deployment, debugging CSP violations, validating policy changes, training and education, and proof-of-concept demonstrations. 📊 SECURITY SCORING SYSTEM Our advanced scoring algorithm evaluates each CSP directive and provides an overall security rating: • 0-1.5: Critical - Immediate security improvements needed • 1.5-2.5: Weak - Significant improvements recommended • 2.5-3.5: Moderate - Good foundation, room for enhancement • 3.5-4.5: Good - Secure configuration following best practices • 4.5-5.0: Excellent - Highly secure, industry-leading configuration The scoring system considers use of unsafe keywords ('unsafe-inline', 'unsafe-eval'), restrictiveness of source lists, best practice compliance, and directive-specific security implications. 🔍 COMPREHENSIVE CSP DIRECTIVE SUPPORT IntegSec CSP Tester understands and explains all major CSP directives including default-src, script-src, style-src, img-src, font-src, connect-src, frame-src, object-src, media-src, frame-ancestors, base-uri, form-action, upgrade-insecure-requests, and block-all-mixed-content. Each directive is explained with what it does, why it matters for security, common use cases, and best practice recommendations. 🛠️ EASY INTEGRATION WITH CSP BUILDER Seamlessly integrated with IntegSec CSP Builder (cspbuilder.integsec.com). Build CSPs using our free online tool, copy and paste instantly, test immediately, and iterate quickly. WORKFLOW: 1. Visit cspbuilder.integsec.com 2. Configure your CSP using our intuitive builder 3. Copy the generated CSP 4. Paste into IntegSec CSP Tester 5. Test on your website 6. Review violations and adjust 7. Deploy with confidence 💡 USE CASES WEB DEVELOPERS: Implement CSP for the first time, debug CSP violations during development, test policy changes before production deployment, understand how CSP affects your application, and learn CSP best practices. SECURITY PROFESSIONALS: Audit websites for CSP implementation, assess CSP security posture, identify misconfigurations and vulnerabilities, document security configurations, and provide security recommendations. SITE ADMINISTRATORS: Troubleshoot CSP-related issues, understand existing CSP configurations, test policy changes safely, validate security improvements, and monitor CSP effectiveness. SECURITY AUDITORS: Rapidly assess CSP implementations, generate security reports, compare configurations across sites, identify security gaps, and provide actionable recommendations. EDUCATORS & STUDENTS: Learn how CSP works, understand security headers, practice with real-world examples, visualize CSP concepts, and build security knowledge. 🔐 SECURITY BENEFITS Implementing proper CSP provides significant security improvements: XSS PROTECTION: CSP is one of the most effective defenses against Cross-Site Scripting attacks. By restricting script sources, CSP prevents attackers from injecting malicious JavaScript into your pages. DATA INJECTION PREVENTION: CSP helps prevent various forms of data injection attacks by controlling which resources can be loaded and executed. CLICKJACKING PROTECTION: The frame-ancestors directive prevents your site from being embedded in malicious frames, protecting against clickjacking attacks. UNAUTHORIZED RESOURCE LOADING: Control exactly which domains can provide resources to your site, preventing unauthorized content loading. MIXED CONTENT PROTECTION: Ensure all resources load over secure connections, preventing mixed content vulnerabilities. COMPLIANCE: Many security standards and regulations recommend or require CSP implementation, including OWASP Top 10 mitigation, PCI DSS best practices, GDPR security requirements, SOC 2 compliance, and ISO 27001 controls. 📖 HOW TO USE VIEW MODE (DEFAULT): 1. Install the extension 2. Navigate to any website 3. Click the extension icon 4. View Mode is active by default 5. See the CSP security score at the top 6. Review directive explanations below 7. Understand the security posture instantly The extension automatically detects CSP headers from HTTP responses, reads CSP from meta tags, calculates security scores, and provides plain English explanations. TEST MODE: 1. Click the extension icon 2. Switch to "Test Mode" tab 3. Paste your CSP policy (or build one at cspbuilder.integsec.com) 4. Toggle "Enable CSP Injection" to ON 5. Navigate to the website you want to test 6. Open browser console (F12) 7. Review CSP violation reports 8. Adjust your policy as needed TESTING TIPS: Start with a restrictive policy and gradually relax it, use the browser console to see all violations, test on staging before production, document allowed sources before implementing, use nonces or hashes instead of 'unsafe-inline', set object-src to 'none' unless you need plugins, use frame-ancestors 'none' to prevent clickjacking, and enable upgrade-insecure-requests for HTTPS sites. 🎓 LEARNING RESOURCES The extension includes built-in educational content: directive explanations, security best practices, common patterns, security scoring details, and real-world examples. Visit cspbuilder.integsec.com for interactive CSP builder tool, step-by-step configuration guides, security recommendations, best practice examples, and comprehensive documentation. 🔧 TECHNICAL DETAILS EXTENSION ARCHITECTURE: Built with Manifest V3, uses Declarative Net Request API for header injection, Service Worker for background processing, Content Scripts to read meta tags, Web Request API to capture headers, and Storage Sync to sync settings across devices. PERMISSIONS: declarativeNetRequest (inject CSP headers), storage (save configurations), activeTab (read CSP headers), webRequest (detect CSP headers), tabs (identify active tab), scripting (read meta tags), and host_permissions <all_urls> (test on any website). PRIVACY & SECURITY: No data collection, local processing only, no tracking or analytics, open source friendly. COMPATIBILITY: Chrome, Edge, Opera, Brave (all Chromium-based browsers). REQUIREMENTS: Chrome/Edge version 88+, works on Windows, Mac, Linux, and Chrome OS. 🚀 GETTING STARTED INSTALLATION: 1. Download the extension ZIP file 2. Extract to a folder 3. Open Chrome/Edge 4. Navigate to chrome://extensions/ (or edge://extensions/) 5. Enable "Developer mode" (toggle in top-right) 6. Click "Load unpacked" 7. Select the extracted extension folder 8. The extension icon appears in your toolbar FIRST USE: 1. Visit any website (try github.com, google.com, or your own site) 2. Click the extension icon 3. View Mode shows the site's CSP automatically 4. See the security score and explanations 5. Switch to Test Mode to try injecting your own CSP QUICK START: VIEW MODE is automatically active, shows CSP from current page with security score. TEST MODE: Click "Test Mode" tab, paste your CSP, toggle injection ON, visit your test website, check console for violations. 💼 PROFESSIONAL USE CASES SECURITY CONSULTING: Use IntegSec CSP Tester to quickly assess client websites, identify security gaps, and provide actionable recommendations. The security scoring system helps prioritize improvements. WEB DEVELOPMENT: Integrate CSP testing into your development workflow. Test policies during development, validate before deployment, and troubleshoot production issues. SECURITY AUDITS: Rapidly audit multiple websites for CSP implementation. Compare configurations, identify patterns, and document findings with the built-in analysis tools. COMPLIANCE ASSESSMENTS: Evaluate websites against security standards that require CSP. Generate reports showing security posture and compliance status. EDUCATION & TRAINING: Teach web security concepts using real-world examples. Students can analyze actual CSP implementations and understand security principles. RESEARCH & ANALYSIS: Study CSP adoption across the web. Analyze implementation patterns, security practices, and industry trends. 🏆 WHY CHOOSE INTEGSEC CSP TESTER? COMPREHENSIVE FEATURES: View Mode for analysis, Test Mode for validation, security scoring system, plain English explanations, integration with CSP Builder, and real-time violation reporting. USER-FRIENDLY: Clean, intuitive interface, no technical knowledge required for basic use, helpful explanations and guidance, one-click mode switching, and clipboard integration. PROFESSIONAL QUALITY: Built by security professionals, follows Chrome extension best practices, regular updates and improvements, reliable and stable, and well-documented. FREE & OPEN: Completely free to use, no subscriptions or hidden costs, no data collection, privacy-focused, and community-supported. ABOUT INTEGSEC: IntegSec is a leading cybersecurity company specializing in penetration testing, security assessments, and security tool development. Our mission is to make web security accessible to everyone. SERVICES: Penetration Testing as a Service (PTaaS), Web Application Security Testing, API Security Assessments, Cloud Infrastructure Security, and Security Consulting. TOOLS: IntegSec CSP Builder (free online CSP configuration tool), IntegSec CSP Tester (this browser extension), and additional security tools and resources. LEARN MORE: Visit integsec.com to learn about our security services and tools. 📞 SUPPORT & FEEDBACK NEED HELP? Visit cspbuilder.integsec.com for documentation, check the extension's built-in explanations, review CSP best practices online, or contact IntegSec for professional security services. FEEDBACK: We're constantly improving IntegSec CSP Tester based on user feedback. Your suggestions help us make the tool better for everyone. REPORT ISSUES: If you encounter any problems or have suggestions, please let us know. We're committed to providing the best CSP testing experience possible. 🔮 FUTURE ENHANCEMENTS We're always working on improvements: enhanced violation reporting, CSP comparison tools, export functionality for reports, additional security metrics, integration with more tools, performance optimizations, and expanded directive support. 📝 VERSION HISTORY Version 1.0.0: Initial release with View Mode (automatic CSP detection), Test Mode (CSP injection), security scoring system, plain English directive explanations, integration with CSP Builder, and support for all major CSP directives. 🎯 PERFECT FOR WEB DEVELOPERS: Building secure web applications? IntegSec CSP Tester helps you implement and test CSP correctly from day one. SECURITY PROFESSIONALS: Conducting security assessments? Quickly analyze CSP implementations and identify security gaps. SITE ADMINISTRATORS: Managing website security? Understand your current CSP and test improvements safely. SECURITY AUDITORS: Performing compliance audits? Rapidly assess CSP configurations across multiple sites. EDUCATORS: Teaching web security? Use real-world examples to help students understand CSP. STUDENTS: Learning web security? Visualize and understand CSP concepts with interactive tools. 🔐 SECURITY FIRST At IntegSec, security is our top priority. This extension follows security best practices, uses secure Chrome extension APIs, processes data locally, doesn't collect user information, is built by security professionals, and undergoes security reviews. PRIVACY: No data collection, no tracking, no analytics, local storage only, and your data stays yours. TRUST: Built by IntegSec, a trusted name in cybersecurity. 📚 ADDITIONAL RESOURCES LEARN MORE ABOUT CSP: MDN Web Docs (comprehensive CSP documentation), W3C CSP Specification (official standard), OWASP (security best practices), and Google CSP Evaluator (additional testing tools). INTEGSEC RESOURCES: CSP Builder (cspbuilder.integsec.com), Security Services (integsec.com/PTaaS), Blog (security articles and guides), and Documentation (detailed usage guides). COMMUNITY: Join security professionals using IntegSec tools to build more secure web applications. 🎉 GET STARTED TODAY Ready to improve your web security? Install IntegSec CSP Tester and start analyzing CSP configurations in seconds. Whether you're implementing CSP for the first time or auditing existing configurations, this tool makes the process simple and effective. Download now and join developers and security professionals who trust IntegSec CSP Tester for their Content Security Policy needs. Remember: Security is not a one-time task. Regular testing and improvement of your CSP configuration is essential for maintaining strong web security. IntegSec CSP Tester makes this process easy and accessible. For professional security services, visit integsec.com/PTaaS. IntegSec CSP Tester - Making Web Security Accessible