Neumorphism.io is a browser-based design tool that enables developers and designers to create user interface elements following the neumorphism (or “soft UI”) design style. This style blends flat design and skeuomorphism, using subtle shadows and highlights to make elements appear raised from or pressed into the background.

The tool provides an interactive interface where users can adjust parameters such as background color, element size, border radius, light source direction, and shadow intensity. As these properties are modified, the visual preview updates in real time, allowing users to experiment with depth and softness effects without writing CSS manually.

Once a design is finalized, Neumorphism.io generates the corresponding CSS code—primarily using box-shadow, background color, and border radius properties—which can be copied directly into a project. This eliminates the trial-and-error process typically required to achieve the dual-shadow effect that defines neumorphic design.

The tool is especially useful for prototyping UI elements such as buttons, cards, toggles, and containers that follow the neumorphic aesthetic. It serves as a lightweight utility rather than a full design system, focusing specifically on generating soft-shadow UI effects quickly and accurately.

Neumorphism.io is positioned as a niche design helper for frontend workflows, particularly for designers exploring modern UI trends or developers implementing visually rich interfaces with minimal effort.

Key features include:

• Visual editor for creating neumorphic UI elements
• Real-time preview of shadow, depth, and lighting effects
• Customization of color, size, radius, and light direction
• Automatic generation of copyable CSS code
• Support for both embossed (inset) and raised (extruded) styles

Common use cases include:

• Designing neumorphic buttons and cards
• Prototyping soft UI interfaces
• Generating CSS shadows quickly
• Experimenting with modern UI design trends
• Learning how neumorphic effects are implemented in CSS

Neumorphism.io is an open-source project created by Adam Giebl and built as a simple React-based tool for generating neumorphic CSS styles.