I am creating a website and I'm wondering if there is a way to display the name of a website in uppercase in Google search results.
Using the sample given in the comments of NASA the way this appears to have been achieved is by using an og:site_name
meta tag and a site name in their structured data for all the pages. The thing to remember here though is that Google ranks NASA as a high value and dependable site which is very unlikely to be playing the system with their markup and as such trusts what they put down. While you can use opengraph meta data and structured markup data whether Google will use this or not depends on how Google's ranking algorithms assess your site.
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It is also that NASA would be in an ontology of brand or organization names and associated with the domain name. Other ontologies created by sites such as Wikipedia can also be used. NASA, being well known and long standing, would have their name presented properly as uppercase just like any mixed case name found in an ontology used. – closetnoc Nov 3 at 20:16
title
tag, you may not get the same in the SERPs. (Google needs to protect against abuse and all uppercase titles could appear as quite "abusive".) – MrWhite Oct 31 at 2:11