Softle — Physics-native design tool

Softle is a browser-based design environment that integrates physics simulation directly into interface design. Build interactive prototypes with realistic motion, collisions, and constraints. Animate and test behaviors like drag, spring, and friction without coding, using a visual editor that maps to runtime physics. Export prototypes or embed them into projects to preserve physics-driven interactions.

Features • Real-time physics simulation for UI components • Visual tools for springs, constraints, and collision handling • Drag-and-drop editor with timeline and property controls • Exportable runtime for integration into production

Get started in the browser — no install required.