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Developer tool to bypass CORS restrictions during local testing. Features profiles, allowlist, and auto-off timer for safety. CORS Helper - Developer Tool for Local Testing ⚠️ FOR DEVELOPERS ONLY - This tool bypasses browser security. Use only during development! 🎯 WHAT IT DOES Bypass CORS (Cross-Origin Resource Sharing) restrictions when testing local applications. Perfect for frontend developers working with APIs on different ports or domains. Smart Profile System • Create multiple profiles for different projects • Domain allowlist per profile • Quick switch between configurations • Import/export profiles as JSON Privacy-First Design • Debug logging OFF by default • No tracking or analytics • No external servers • All data stored locally • You control what gets logged Auto-Off Timer • 10 minutes, 30 minutes, 2 hours, or infinite • Countdown badge shows remaining time • Global mode defaults to 10-min timer for safety • Never leave CORS accidentally disabled Domain Management • Allowlist mode: Only specified domains (recommended) • Global mode: All domains (use with caution) • Right-click context menu: "Allow this domain" • "Allow Active Tab" button for instant access • Preset buttons for common localhost ports Debug Logging (Optional) • Track which requests are modified • View HTTP status codes and methods • Preflight failure detection with helpful hints • Logs capped at 60 entries, stored locally only Built-In Test Console • Test API endpoints directly from options page • Supports GET, POST, PUT, PATCH, DELETE • Add custom headers to trigger preflight • View all CORS headers in response • JSON formatting and error troubleshooting 🎨 USER EXPERIENCE • Dynamic icons for different modes (off/allowlist/global) • Keyboard shortcuts for quick actions • Dark mode support • Clean, modern interface • Onboarding wizard for first-time users • Real-time countdown badge 🔒 SECURITY & PRIVACY ✓ Manifest V3 compliant ✓ No external API calls ✓ No tracking or analytics ✓ Open source code ✓ Data never leaves your browser ✓ Debug logging OFF by default ✓ Clear privacy policy 📋 COMMON USE CASES 1. Test React/Vue/Angular apps with backend APIs on different ports 2. Connect microservices running locally on different ports 3. Test third-party APIs without CORS restrictions 4. Develop Chrome extensions with cross-origin requests 5. Connect local dev server to mobile test devices 💡 BEST PRACTICES • Use Allowlist mode for better security • Enable Auto-off timer when using Global mode • Turn on Debug logging only when troubleshooting • Create separate profiles for different projects • Disable when not actively testing ⚠️ IMPORTANT DISCLAIMER FOR DEVELOPMENT USE ONLY. Disabling CORS removes an important browser security feature. Only use during local development on domains you control. Always disable when browsing normally.
Cross Domain - CORS
Cross Domain will help you to deal with cross domain - CORS problem. This is tool helpful when face with cross domain issue. Cross Domain CORS Extension simplifies the handling of Cross-Origin Resource Sharing (CORS) issues, providing an essential tool for web developers and other professionals who encounter cross-domain challenges. - Enable Cross-Domain Requests: Facilitates communication between different domains by managing CORS policies. - Customizable URL Patterns: Utilize JavaScript Regex to define and manage URL patterns for CORS requests, offering granular control. Toggle Functionality: Easily enable or disable the extension to suit your development needs. - User-Friendly Interface: Designed with simplicity in mind, the interface ensures an intuitive user experience. Under the hood, the extension adjusts the server's response headers to enable CORS requests. It modifies and adds essential headers, including: This targeted modification facilitates seamless cross-origin requests and responses, crucial for developing modern web applications. Visit my website for more details: https://devratroom.blogspot.com/p/cross-domain-cors-extension.html
CORS Unblocker
Temporarily bypass CORS restrictions to streamline development and testing workflows. CORS Unblocker: Effortless Cross-Origin Development and Testing Simplify API Testing and Web Development Take control of your development workflow with CORS Unblocker, the ultimate tool for bypassing Cross-Origin Resource Sharing (CORS) restrictions. Designed with developers and testers in mind, this extension streamlines the process of working with local and cross-origin APIs. Key Features Instant CORS Bypass Enable or disable CORS restrictions with a single click, removing barriers to seamless API and web application testing. No server-side changes required! Temporary and Secure CORS unblock settings are temporary and automatically reset when the browser closes, ensuring your browsing remains secure. Developer-Focused Design Tailored specifically for developers and testers, this tool simplifies debugging and accelerates workflows for local development and API integrations. Built-In Security Warning Receive clear, built-in warnings about potential security implications when disabling CORS, empowering you to make informed choices. Minimalist, User-Friendly Interface Enjoy a sleek, intuitive UI that makes toggling the CORS unblocker quick and hassle-free. Safe for Development Environments Perfect for debugging and testing without affecting live or production systems, keeping your projects secure. Plug-and-Play Functionality No setup required—just install, enable, and start using immediately. Universal Compatibility Works across all websites and API endpoints, offering a comprehensive solution for cross-origin issues. Why Choose CORS Unblocker? Whether you're a seasoned developer or just starting, CORS Unblocker is an essential tool for enhancing your productivity. Debug, test, and develop faster while keeping your projects secure and efficient. Download now and revolutionize your cross-origin development!
Universal CORS Rewriter
Rewrite CORS headers for any domain so requests work from any origin 🚀 WHAT IT DOES Automatically bypasses CORS (Cross-Origin Resource Sharing) restrictions for ANY domain by injecting permissive CORS headers. Perfect for web developers who need to test APIs, access resources, or develop applications without CORS blocking requests. ✨ KEY FEATURES • 🌍 Universal Support - Works with any HTTP/HTTPS domain • 🎛️ Easy Toggle - Simple ON/OFF control via extension icon • 📱 Visual Feedback - Color-coded badge shows current status (Green=ON, Red=OFF) • 🔧 Zero Configuration - Works immediately after installation • 🚀 Modern Technology - Built with Manifest V3 for reliability • 🔍 Debug Friendly - Console logging for troubleshooting 🎯 PERFECT FOR • API Testing and Development • Cross-domain resource access • Frontend development with external APIs • Testing fetch() and XMLHttpRequest calls • Accessing CDN resources • Localhost development with external services 🎮 HOW TO USE 1. Install the extension 2. Click the extension icon to enable (badge turns green) 3. Make requests to any domain from your web application 4. CORS restrictions are automatically bypassed! 5. Click again to disable when not needed ⚠️ IMPORTANT NOTES • FOR DEVELOPMENT ONLY - Not intended for production use • Only affects YOUR browser - doesn't change server policies • Configure proper CORS on your servers for production • Toggle OFF when not needed for security 📋 PERMISSIONS EXPLAINED • "declarativeNetRequest" - To modify response headers • "storage" - To remember ON/OFF state • "webRequest" - To intercept network requests • "host permissions" - To work with all domains Perfect for developers who need a reliable, easy-to-use CORS bypass tool for testing and development!
Allow CORS
Enable this extension to bypass CORS errors and make API calls from different domains seamlessly Tired of annoying CORS errors blocking your API requests? Allow CORS chrome extension is your ultimate fix. This powerful extension lets you bypass cross-origin restrictions instantly—no coding, no headaches. With just one click, unlock seamless API communication across different domains and keep your workflow smooth. Say goodbye to frustrating roadblocks and hello to hassle-free web development. One-Click Toggle – Enable or disable with a single click. Perfect for Developers – Ideal for API testing and debugging. Install the Extension – Add the Allow CORS extension to your browser. Enable It – Click on the extension icon and turn it on. Disable When Not Needed – Toggle off the extension when it’s no longer required. The restrictions imposed by CORS become a significant development challenge for testers and developers who need to make API calls between different domains. This extension offers an effective and quick solution which avoids both server modifications and workaround approaches. The tool improves development efficiency because programmers can maintain application development and testing activities free from security barriers. Who Can Benefit from This Extension? Frontend Developers utilize this extension for API testing that bypasses backend standards during development work. The QA engineers & testers benefit from a solution that helps debug requests that span across different domains. API Developers benefit from this solution because it streamlines their work of testing API connections.
