CORS Tester
Test URLs to see if they are blocked by browser Cross-Origin Resource Sharing (CORS) policies.
Technical Details:
Understanding CORS Errors in Web IPTV Players
If you are using a web-based IPTV player, you might have encountered streams that simply refuse to play, even though they work perfectly in desktop applications like VLC. This is almost always caused by Cross-Origin Resource Sharing (CORS) restrictions. Browsers strictly enforce CORS policies for security reasons, preventing a web application on one domain from fetching video stream data from a different domain unless the streaming server explicitly permits it by returning the correct headers.
Our CORS Tester tool allows you to input any live stream URL (such as .m3u8 or .ts links) to determine if it is being blocked by the browser. The tool attempts to fetch the stream's headers directly and analyzes the response. If the server does not return the required `Access-Control-Allow-Origin: *` header, the stream will fail to play in standard web browsers. By using this tool, you can quickly identify whether a playback failure is due to a dead link or a browser security restriction, helping you decide if you need to use our Native Desktop or Mobile apps to bypass these limitations entirely.