# Preview access
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In addition to helping you identify resources that are shared with an external entity, AWS IAM Access Analyzer also shows you a preview of IAM Access Analyzer findings before deploying resource permissions so you can validate that your policy changes grant only intended public and cross-account access to your resource. This helps you start with intended external access to your resources.

You can preview and validate public and cross-account access to your Amazon S3 buckets in the [Amazon S3 console](https://aws.amazon.com/s3/). You can also use IAM Access Analyzer APIs to preview public and cross-account access for your Amazon S3 buckets, AWS KMS keys, IAM roles, Amazon SQS queues and Secrets Manager secrets by providing proposed permissions for your resource.

**Topics**
+ [Previewing access in Amazon S3 console](access-analyzer-preview-access-s3-console.md)
+ [Previewing access with IAM Access Analyzer APIs](access-analyzer-preview-access-apis.md)