Add a CORS configuration to an S3 bucket

Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/.
In the Bucket name list, choose the name of the bucket that you want to create a bucket policy for.
Choose Permissions, and then choose CORS configuration.
In the CORS configuration editor text box, type or copy and paste a new CORS configuration, or edit an existing configuration. The CORS configuration is an XML file

Example of CORS:

The first rule allows cross-origin PUT, POST, and DELETE requests from the http://www.example1.com origin. The rule also allows all headers in a preflight OPTIONS request through the Access-Control-Request-Headers header. In response to preflight OPTIONS requests, Amazon S3 returns requested headers.
The second rule allows the same cross-origin requests as the first rule, but the rule applies to another origin, http://www.example2.com.

The third rule allows cross-origin GET requests from all origins. The * wildcard character refers to all origins.

<CORSConfiguration>
 <CORSRule>
   <AllowedOrigin>http://www.example1.com</AllowedOrigin>

   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>

   <AllowedHeader>*</AllowedHeader>
 </CORSRule>
 <CORSRule>
   <AllowedOrigin>http://www.example2.com</AllowedOrigin>

   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>

   <AllowedHeader>*</AllowedHeader>
 </CORSRule>
 <CORSRule>
   <AllowedOrigin>*</AllowedOrigin>
   <AllowedMethod>GET</AllowedMethod>
 </CORSRule>
</CORSConfiguration>

Add a CORS configuration to an S3 bucket

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