Root domains and subdomains are not case-sensitive, but servers and search engines generally treat page slugs with capital letters as different URLs altogether. For instance, Example.com and WWW.example.com will redirect properly to your site at www.example.com, but www.example.com/JoinUs would be treated as a different link than your NationBuilder page at www.example.com/joinus.

Pages created in NationBuilder default to lowercase slugs, but you can manually create a redirect with capital letters using the legacy URL importer, like so:

If you would like to redirect URL paths with capital letters to the lowercase versions by default — rather than create a new redirect each time — this can be done using Javascript. The following snippet will change any URLs accessed on your site with capital letters to lowercase, and I would recommend adding it to the top of you page_not_found.html theme file so that the script runs only when the site cannot locate a given page.

Complete and current information on how to use NationBuilder is available in the documentation section.