Major Description
To make it easier to debug the current state of a s3 bucket a web based browser would help a lot.
awslabs provides a simple browser using the aws js sdk under Apache 2 license: awslabs/aws-js-s3-explorer
The integration is very simple: in case of a predefined query parameter (eg ?browser=true) the GET bucket endpoint can return with the browser html. As this is not a standard aws api parameter the clients will never add it to the url.