A collapsible platform assembly includes an upper platform having a perimeter wall, a top surface, and a plurality of pivoting support legs, and a lower platform having a perimeter wall, a top surface, and a plurality of pivoting support legs. A connector assembly connects the lower platform to the upper platform. The connector assembly is configured to provide adjustability of the collapsible platform assembly between a deployed configuration with the upper and lower platforms separated and a collapsed configuration with the top surface of the lower platform nesting within the perimeter wall of the upper platform. When deployed, the collapsible platform assembly provides two elevated platforms that can support a user to reach high areas. When collapsed, the platform assembly reduces in size with the lower platform nesting within the upper platform for compact storage and easy transport.