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Premium CORS testing tool. Inspect status codes, response headers, and CORS policies for any URL β fast and beautifully presented. π CORS Tester β The Premium CORS Inspection Tool for Developers Tired of fighting with Access-Control-Allow-Origin errors? π© Meet CORS Tester β the fastest, most beautiful way to debug CORS issues directly from your browser! β‘ β¨ Why You'll Love It π― One-Click Request Testing Pick your HTTP method (GET, POST, PUT, DELETE, HEAD, OPTIONS, PATCH), paste a URL, and hit Send. That's it! π¦ π Color-Coded Status Verdicts Instantly see what happened: π’ 2xx β Success π‘ 3xx β Redirect π΄ 4xx / 5xx β Error π Smart CORS Analysis Get an automatic verdict on whether the endpoint is: π Publicly accessible (any origin) π Restricted to specific origins π« No CORS configured at all π Full Response Headers Table Every header returned, with CORS-relevant ones highlighted for quick scanning. π¨ π Recent URL History Your last 10 tested URLs stored locally for instant re-testing. πΎ π Copy as cURL One click to copy the exact request as a cURL command β perfect for sharing with your team or pasting into your terminal. π» πΌοΈ Premium Landscape UI A gorgeous 900Γ600 popup with smooth gradients, soft shadows, and buttery transitions. Debugging has never looked this good! π π Privacy First π‘οΈ Zero tracking. Zero analytics. Zero third-party calls. The extension only sends the URLs you explicitly type. Your data stays yours. π€ π¨βπ» Built for Developers Whether you're: ποΈ Building APIs and need to verify CORS configs π Debugging "Why is my fetch blocked?!" errors π¬ Auditing third-party endpoints π Learning how CORS actually works β¦CORS Tester is your new best friend. β€οΈ βοΈ Technical Details β Manifest V3 compliant β Chrome 108+ β No external dependencies β Lightweight & blazing fast ποΈ π Install now and never guess at CORS headers again! π
May 8, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.