CORS Tester

🌐 CORS Tester — The Premium CORS Inspection Tool for Developers

Tired of fighting with Access-Control-Allow-Origin errors? 😩 Meet CORS Tester — the fastest, most beautiful way to debug CORS issues directly from your browser! ⚡

✨ Why You'll Love It
🎯 One-Click Request Testing
Pick your HTTP method (GET, POST, PUT, DELETE, HEAD, OPTIONS, PATCH), paste a URL, and hit Send. That's it! 🚦

📊 Color-Coded Status Verdicts
Instantly see what happened:

🟢 2xx — Success
🟡 3xx — Redirect
🔴 4xx / 5xx — Error
🔍 Smart CORS Analysis
Get an automatic verdict on whether the endpoint is:

🌍 Publicly accessible (any origin)
🔒 Restricted to specific origins
🚫 No CORS configured at all
📋 Full Response Headers Table
Every header returned, with CORS-relevant ones highlighted for quick scanning. 🎨

🕘 Recent URL History
Your last 10 tested URLs stored locally for instant re-testing. 💾

📎 Copy as cURL
One click to copy the exact request as a cURL command — perfect for sharing with your team or pasting into your terminal. 💻

🖼️ Premium Landscape UI
A gorgeous 900×600 popup with smooth gradients, soft shadows, and buttery transitions. Debugging has never looked this good! 💎

🔐 Privacy First
🛡️ Zero tracking. Zero analytics. Zero third-party calls.
The extension only sends the URLs you explicitly type. Your data stays yours. 🤝

👨‍💻 Built for Developers
Whether you're:

🏗️ Building APIs and need to verify CORS configs
🐛 Debugging "Why is my fetch blocked?!" errors
🔬 Auditing third-party endpoints
🎓 Learning how CORS actually works
…CORS Tester is your new best friend. ❤️

⚙️ Technical Details
✅ Manifest V3 compliant
✅ Chrome 108+
✅ No external dependencies
✅ Lightweight & blazing fast 🏎️
🎉 Install now and never guess at CORS headers again! 👇