Code for public, read only access to a bucket

To make your S3 bucket publicly readable, you'll need to:

1. First, modify the Block Public Access settings for your bucket:

• Navigate to your bucket in the S3 console
• Click on the "Permissions" tab
• Find "Block public access" and click "Edit"
• Uncheck "Block all public access" (you may need to uncheck all four individual settings)
• Save the changes

2. Then add a bucket policy that grants public read access:

• In the "Permissions" tab, go to "Bucket policy"
• Add the following policy (replace "YOUR-BUCKET-NAME" with your actual bucket name):

{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "PublicReadGetObject",
"Effect": "Allow",
"Principal": "*",
"Action": [
"s3:GetObject"
],
"Resource": [
"arn:aws:s3:::YOUR-BUCKET-NAME/*"
]
}
]
}

This policy grants anyone on the internet permission to read any object in your bucket. The /* at the end of the Resource ARN indicates that the policy applies to all objects within the bucket.

If you get an error when saving the policy, double-check that:

• The bucket name in the policy exactly matches your actual bucket name
• You've properly disabled the Block Public Access settings
• The JSON syntax is correct

Remember that making a bucket public means anyone can access its contents, so ensure you don't store sensitive information there.
Sources
Setting permissions for website access - Amazon Simple Storage Service
frontend s3 bucket access | AWS re:Post
Tutorial: Configuring a static website using a custom domain registered with Route 53 - Amazon Simple Storage Service