UniPAD is a novel self-supervised learning framework designed for autonomous driving, focusing on learning effective representations from 3D data such as LiDAR point clouds and multi-view images. The framework consists of a modality-specific encoder, a mask generator for challenging training, a unified 3D volumetric representation, and a neural rendering decoder. UniPAD showed promising results in improving performance on tasks like 3D object detection and semantic segmentation, outperforming other pre-training methods and offering potential for broader applications beyond autonomous driving.