URDF Validation + Kinematic Analysis API with Browser-Based Preview (Tested on Robonaut 2)

A developer has launched a URDF validation and kinematic analysis API with a browser-based 3D preview layer, designed to catch robot model failures before they reach RViz or simulation. The pipeline was stress-tested using NASA's Robonaut 2 (R2) URDF, which contains over 100 joints and a complex tree hierarchy. The tool performed structural validation, computed 74 degrees of freedom (DOF) from non-fixed joints, identified a chain depth of 19, and detected multiple end effectors (hands, fingers, sensors). Tree reconstruction confirmed a valid single-root structure with no cycles or orphans. The browser preview correctly visualizes joint origins (xyz/rpy), parent-child relationships, and joint axis orientations.

The pipeline follows a four-step process: upload, validate, analyze, and preview. It requires no ROS environment or RViz installation—validation runs server-side, and the file is deleted after the response. The 3D preview is entirely client-side. The developer notes that most URDF tooling focuses on XML/schema validation, but real-world failures often appear in TF tree inconsistencies, incorrect joint transforms, misconfigured DOF, and broken kinematic chains. This tool aims to surface those issues earlier via structural validation, kinematic introspection, and immediate visual feedback. A live demo is available at https://roboinfra-dashboard.azurewebsites.net/validator. The developer is seeking feedback on additional validation rules, kinematic analysis gaps, and CI/CD use cases like pre-merge URDF checks and regression detection.