iOS Question [SOLVED] Alternative to UDID.IO to find UDID on iPad

I'been trying to find the UDID on a new IPad 8th gen 10.5" using the site udid.io (get.udid.io) but the "Find Udid" button did not appear in Safari. So after searching a while I found another site:
http://webapp.diawi.com witch works with Erel tutorial "Creating a certificate and provisioning profile"

Alejandro