How to get the md5sum of a file on Amazon's S3

Question

If I have existing files on Amazon\'s S3, what\'s the easiest way to get their md5sum without having to download the files?

Thanks

Answer 1

I have cross checked jets3t and management console against uploaded files' MD5sum, and ETag seems to be equal to MD5sum. You can just view properties of the file in AWS management console:

https://console.aws.amazon.com/s3/home