DevBuildBox

CSS Glassmorphism & Neumorphism Generator

Visual sliders that output ready-to-use CSS code for modern UI effects.

Preview

background: rgba(255, 255, 255, 0.2);
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
border: 1px solid rgba(255, 255, 255, 0.3);

About the CSS Effects

This tool helps you generate code for two popular modern CSS design trends: Glassmorphism and Neumorphism. Both effects can add depth and a tactile feel to your user interfaces.

Glassmorphism

Glassmorphism is a style that mimics the appearance of frosted glass. It is characterized by a combination of transparency, background blur, and a subtle border, creating a layered effect as if elements are floating on top of a blurred background. This effect is great for sidebars, navigation bars, and cards.

  • Transparency (alpha): Controls how see-through the element is.
  • Background Blur: Uses the backdrop-filter property to blur the content behind the element.
  • Subtle Border: A semi-transparent white border adds a finishing touch, making the edges of the element 'catch the light.'

Neumorphism (Soft UI)

Neumorphism is a design style that uses soft, extruded shapes to create a minimalist, plastic-like aesthetic. The key is in the shadows. Instead of using a single drop shadow, it uses two: a light shadow on one side and a dark shadow on the opposite side. This makes the element look like it's part of the background, pushed out or pressed in.

  • Matching Colors: The element often has the same background color as its parent container.
  • Dual Shadows: A light, top-left shadow and a dark, bottom-right shadow create the extruded look.
  • Low Contrast: The effect is subtle and relies on low contrast between the element and its background.

How to Use the Generator

  1. Select an Effect: Choose between the Glassmorphism and Neumorphism tabs.
  2. Adjust the Sliders: Use the sliders to control properties like blur, transparency, and shadow distance.
  3. Pick a Color: Use the color picker to select the base color for your element.
  4. Preview Live: See your changes reflected in the preview area in real-time.
  5. Copy the Code: Grab the generated CSS from the code box and paste it into your stylesheet.

The Designer's Guide to Modern CSS Styling: Glassmorphism and Neumorphism

In modern frontend development, flat UI is evolving into highly stylized, tactile interfaces. Two distinct design philosophies dominate 2026 interfaces: Glassmorphism (the Apple aesthetic) and Neumorphism (the soft extruded plastic look). Achieving these complex visual states manually via CSS requires juggling alpha-channels, multi-layered box shadows, and backdrop filters. Our live generator instantly calculates the underlying math so you can copy and paste production-ready code directly into your React, Vue, or vanilla HTML projects.

Mastering Glassmorphism

Glassmorphism creates the illusion of a frosted glass pane sitting directly over background content. Perfected by Apple in macOS and iOS, it provides a sense of hierarchy and depth without resorting to heavy drop shadows.

The 3 Critical CSS Ingredients:

  • Semi-Transparent Background: Utilizing `rgba()` to dial in exact transparency, usually a milky white or dark graphite.
  • Backdrop Filter (Blur): The CSS property `backdrop-filter: blur(10px)` is what does the heavy lifting, mathematically blurring whatever colors rest behind the div. (Note: Always include the `-webkit-backdrop-filter` prefix for Safari support).
  • 1px Semitransparent Border: A very faint white border physically separates the "glass" from the background, creating the edge highlight as if it's catching light.

Mastering Neumorphism (Soft UI)

Neumorphism bridges the gap between old-school skeuomorphism and modern minimal flat design. It simulates objects physically extruding from or pressing into the background canvas itself, like vacuum-formed plastic.

The 3 Critical CSS Ingredients:

  • Zero Contrast Background: The UI element MUST have the exact same background color as the canvas it sits on to create the illusion it is made of the same material.
  • Dual Multi-Directional Shadows: This requires two comma-separated `box-shadow` statements. One shadow points top-left and is tinted lighter than the background (the highlight). The second shadow points bottom-right and is tinted darker (the shadow).
  • Soft Corner Radii: Neumorphism relies entirely on soft, organic curves. Sharp 90-degree angles break the vacuum-formed illusion.