CORS (Cross Origin Resource Sharing) Tester

Cross-origin resource sharing (CORS) is a mechanism that allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served

Step 1 : User Opens an URL in Browser from domain

Step 2 : The loaded page from tries to make an HTTP POST (Ajax) call to a resource from domain

Step 3 : Browser makes a Pre-flight HTTP OPTIONS request to domain to make sure allows CORS request from

Step 4 : Once successful response received from, then the actual Ajax call (HTTP POST) is made to by browser

Open developer tools to see HTTP OPTIONS request being made by browser while testing below

Get more details here

If you want to test your own api from here ( then allow OPTIONS request from in you webserver

To test the above example click here

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