Amazon S3 Public Read Policy

Navigate to the https://s3.console.aws.amazon.com/s3/buckets URL where all of your buckets are listed.  Click on the name of the bucket that you would like to allow public access via either the s3 bucket URL or a customized CName. Go into the Permissions tab, first you will want to edit the Block public access (bucket settings) part and turn off the Block all public access checkbox.

You will want to then edit the next Bucket policy section with the following JSON Code. This is the JSON that you need to paste into the S3 Bucket Policy to allow for public read of its contents. Make sure to rename the "bucket-name" in the JSON code.

{
    "Version": "2008-10-17",
    "Statement": [
        {
            "Sid": "AllowPublicRead",
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::bucket-name/*"
        }
    ]
}