S3 Policy

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
          "s3:PutObject",
          "s3:GetObject",
          "s3:DeleteObject",
          "s3:PutObjectAcl",
          "s3:ListBucket"
      ],
      "Resource": [
          "arn:aws:s3:::REPLACE_WITH_BUCKET_NAME/*"
      ]
    },
    {
      "Effect": "Allow",
      "Action": "s3:ListBucket",
      "Resource": [
        "arn:aws:s3:::REPLACE_WITH_BUCKET_NAME"
      ]
    }
  ]
}

For Direct Upload (CORS)

[
    {
        "AllowedHeaders": [
            "Authorization"
        ],
        "AllowedMethods": [
            "GET"
        ],
        "AllowedOrigins": [
            "*"
        ],
        "ExposeHeaders": [],
        "MaxAgeSeconds": 3000
    },
    {
        "AllowedHeaders": [
            "*"
        ],
        "AllowedMethods": [
            "PUT"
        ],
        "AllowedOrigins": [
            "https://www.example.com"
        ],
        "ExposeHeaders": [],
        "MaxAgeSeconds": 3000
    }
]