Alert specific element in [object FormData] (for testing)

I'm trying to see what content is contained inside an [object FormData], and in particular inside a specific element whose name should be Name. I would like to alert it, to check if the content is correct, but doing so returns undefined:

    alert(fd['Name']);

I'm pretty sure I'm loading the form data correctly, so I was wondering if the problem is that I'm accessing the data in the wrong way...

PS alerting only fd returns [object FormData]