DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! I don’t have any UX research to cite, but anecdotally, I like it when inputs that expect data in a specific format use an input mask. I thought I’d just line up a few demos for really easy reference. Robin Herbots’s (jQuery) Inputmask This is an actively maintained plugin. See the Pen jQuery