Frequently asked question
No, it is not possible to word wrap the field alias text in a pop-up in ArcGIS Online. As a workaround, open the hosted feature layer in ArcGIS Pro, configure the pop-up, and overwrite the hosted feature layer to ArcGIS Online.
The image below shows the field alias 'Bench Length In Inches' appears wrapped in ArcGIS Online Map Viewer.
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