Error opening image in s3 bucket

The "Access Denied" error you're encountering when trying to open images directly via their URL in your S3 bucket can occur for several reasons:

1. Public access settings: By default, S3 buckets and objects are private. If you're trying to access the image through its public URL, you'll need to ensure that public access is enabled for both the bucket and the specific object.

2. Bucket policy: Your bucket policy may not allow public read access to the objects. You might need to update the bucket policy to allow the s3:GetObject action for the specific objects or the entire bucket.

3. Object ACL (Access Control List): The individual object's ACL settings might be restricting access. You may need to update the object's permissions to allow public read access.

4. Encryption: If the objects are encrypted using server-side encryption (especially with AWS KMS), you may need specific permissions to decrypt the objects.

5. IAM permissions: Even if you're logged into the console, your IAM user or role might not have the necessary permissions to access these specific objects.

To resolve this issue:

1. Check and modify your bucket's public access settings if necessary.
2. Review and update your bucket policy to allow public read access if that's your intention.
3. Verify the ACL settings for the specific objects that are causing issues.
4. If the objects are encrypted, ensure you have the necessary permissions to decrypt them.
5. Review your IAM permissions to make sure you have the required access to these objects.

Remember, making objects publicly accessible has security implications, so ensure this aligns with your security requirements. If you only need temporary access, consider using pre-signed URLs instead of making the objects public.
Sources
S3 AWS doesn't show my image, but I am able to download it | AWS re:Post
Can't Open a Link to download a File | AWS re:Post
Troubleshoot access denied (403 Forbidden) errors in Amazon S3 - Amazon Simple Storage Service