Justinmind

Justinmind is a free design and prototyping tool for creating interactive web and mobile app prototypes without coding. It enables designers to build everything from low-fidelity wireframes to high-fidelity simulations with advanced interactions, animations, and mobile gestures. The platform includes built-in UI design capabilities, form prototyping, and collaboration features, helping teams reduce rework and boost user adoption through comprehensive interaction design testing.

Create clickable prototypes for web applications

Design interactive mobile app prototypes

Test user flows and navigation

Prototype forms and data interactions

Validate designs before development

Design wireframes for conceptualization

Create design specifications for developers

Build high-fidelity interactive simulations

Design UI components and patterns