An onboard platform for loading cargo into and unloading cargo from a trailer includes a first portion comprising a plurality of beams secured together. The first portion is configured to provide stability and rigidity to the platform. The onboard platform also includes a second portion comprising a turntable rotatably attached to the first portion proximate a center point of the turntable, the turntable configured to move about the rotational attachment in a selected range of degrees relative to the first portion. The onboard platform is configured to move between in a first position where the platform is stowed below a bed of the trailer and a second position where the platform extends from an edge of the bed of the trailer and is secured into the second position to aid in loading cargo into and unloading cargo from the trailer.