Custom fonts are coming to ArcGIS Online at the end of this year. For Enterprise users, that means waiting for Spring or Summer 2026 to get this feature. Don't want to wait that long? Here's a Demo Widget for getting custom fonts, or any other CSS, into Enterprise 11.X today.
How does it work? Well, any React component can carry it's own CSS, but CSS is not strictly confined to the component. So, just write some CSS in a Custom Widget that targets the whole page, or a specific component, and your CSS overwrites the default CSS. Just drop in a CSS Widget into some unused spot in your application,
