CSS Glassmorphism Generator

What does the CSS Glassmorphism Generator do?

The CSS Glassmorphism Generator designs frosted glass UI components with live visual refraction preview. It lets developers customize backdrop blur intensity (backdrop-filter: blur(10px)), translucent alpha background opacities, subtle edge highlight borders, ambient drop shadows, corner radii, and base glass tint colors. It features instant zero-click auto-conversion to standard CSS with -webkit- vendor prefixes and matching Tailwind utility classes (bg-white/20 backdrop-blur-md border border-white/20 shadow-lg rounded-2xl).

Core Concepts

Key mechanics behind realistic glassmorphism UI:

• backdrop-filter: blur(): Blurs the graphical content located directly behind the element rather than the element itself.
• -webkit-backdrop-filter Prefix: Essential vendor prefix required for full compatibility with Apple Safari and iOS WebKit browsers.
• Translucent High-Contrast Borders: A semi-transparent white border (border: 1px solid rgba(255, 255, 255, 0.25)) simulates the physical beveled edge of cut glass where light refracts.
• Vibrant Background Contrast: Glassmorphism relies on high-chroma backgrounds, colorful gradients, or vivid photography underneath to make the frosted effect visible.

How to use the tool?

1. Adjust Glass Sliders: Fine-tune the Backdrop Blur (0–40px), Background Opacity (0–100%), and Border Outline Opacity.
2. Select Presets: Click any preset (Subtle Frost, Deep Blur, Crystal White, Dark Obsidian, Neon Tint).
3. Copy Code: Grab the production-ready CSS declaration or Tailwind utility classes with a single click.

Related Developer Utilities

If you work with CSS design tokens, web styling, and UI components, explore these complementary tools:

• CSS Box Shadow Generator: Generate multi-layer elevation box shadows and Tailwind classes.
• CSS Gradient Generator: Generate linear and radial CSS gradients and SVG tags.
• CSS Border Radius Generator: Create 4-corner curves and 8-value organic blob shapes.
• CSS Triangle Generator: Create directional arrows and tooltip pointers using border tricks or clip-path.

REST API Integration

Blueutils provides a free REST API endpoint (POST https://blueutils.com/api/css/glassmorphism-generator) to programmatically calculate frosted glass declarations and Tailwind tokens.

API Request Parameters

API Request Payload Examples

cURL

curl -X POST https://blueutils.com/api/css/glassmorphism-generator \
  -H "Content-Type: application/json" \
  -d '{
    "blur": 16,
    "opacity": 25,
    "borderOpacity": 40,
    "borderRadius": 16,
    "color": "#ffffff"
  }'

Python

import requests

url = "https://blueutils.com/api/css/glassmorphism-generator"
payload = {
    "blur": 16,
    "opacity": 25,
    "borderOpacity": 40,
    "borderRadius": 16,
    "color": "#ffffff"
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.json())

Java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        String jsonPayload = """
            {
                "blur": 16,
                "opacity": 25,
                "borderOpacity": 40,
                "borderRadius": 16,
                "color": "#ffffff"
            }
            """;

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://blueutils.com/api/css/glassmorphism-generator"))
            .header("Content-Type", "application/json")
            .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
            .build();

        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}

API Response Parameters

API Response Payload Examples

Success Response (HTTP 200 OK)

{
  "isValid": true,
  "config": {
    "blur": 16,
    "opacity": 25,
    "borderOpacity": 40,
    "borderRadius": 16,
    "color": "#ffffff"
  },
  "bgRgba": "rgba(255, 255, 255, 0.25)",
  "borderRgba": "rgba(255, 255, 255, 0.4)",
  "shadowRgba": "rgba(0, 0, 0, 0.1)",
  "blurVal": "16px",
  "radiusVal": "16px",
  "cssDeclaration": "background: rgba(255, 255, 255, 0.25);\n-webkit-backdrop-filter: blur(16px);\nbackdrop-filter: blur(16px);\nborder: 1px solid rgba(255, 255, 255, 0.4);\nborder-radius: 16px;\nbox-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);",
  "tailwind": "bg-white/25 backdrop-blur-lg border border-white/20 shadow-lg rounded-2xl"
}

Validation Failure Response (HTTP 400 Bad Request)

{
  "isValid": false,
  "error": "Invalid glassmorphism configuration: blur or opacity parameters invalid."
}

Rate Limit Exceeded Response (HTTP 429 Too Many Requests)

{
  "error": "API rate limit exceeded. Please wait or contact support@blueutils.com."
}

Why use an API to generate Glassmorphism?

Integrating the Glassmorphism API into design token build pipelines, headless component generators, or AI agents provides key benefits:

• Automated OpenGraph Banner & Modal Styling: Generates deterministic frosted glass overlay rules for dynamic social cards and popup banners.
• AI Agent Styling & UI Generation: Enables AI frontend agents to generate photorealistic frosted glass cards with both -webkit-backdrop-filter and standard properties.
• Design Token Automation: Compiles glass blur stops and border opacities into normalized CSS variables and Tailwind theme configurations.

Native Usage

How to generate frosted glass CSS declarations programmatically across programming environments:

Node.js (JavaScript)

// Calculate frosted glass CSS rules in Node.js
function getGlassmorphism(blur, opacity, borderOpacity, radius, color = '#ffffff') {
  const hex = color.replace('#', '');
  const r = parseInt(hex.substring(0, 2), 16) || 255;
  const g = parseInt(hex.substring(2, 4), 16) || 255;
  const b = parseInt(hex.substring(4, 6), 16) || 255;

  return [
    `background: rgba(${r}, ${g}, ${b}, ${opacity / 100});`,
    `-webkit-backdrop-filter: blur(${blur}px);`,
    `backdrop-filter: blur(${blur}px);`,
    `border: 1px solid rgba(${r}, ${g}, ${b}, ${borderOpacity / 100});`,
    `border-radius: ${radius}px;`,
    `box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);`
  ].join('\n');
}

console.log(getGlassmorphism(16, 25, 40, 16));

Windows (PowerShell Script)

# Programmatically calculate frosted glass CSS in PowerShell
$blur = 16; $opacity = 0.25; $borderOpacity = 0.40; $radius = 16
$css = @"
background: rgba(255, 255, 255, $opacity);
-webkit-backdrop-filter: blur(${blur}px);
backdrop-filter: blur(${blur}px);
border: 1px solid rgba(255, 255, 255, $borderOpacity);
border-radius: ${radius}px;
box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
"@
Write-Host $css

Python

def create_glassmorphism(blur=16, opacity=0.25, border_opacity=0.4, radius=16):
    return (
        f"background: rgba(255, 255, 255, {opacity});\n"
        f"-webkit-backdrop-filter: blur({blur}px);\n"
        f"backdrop-filter: blur({blur}px);\n"
        f"border: 1px solid rgba(255, 255, 255, {border_opacity});\n"
        f"border-radius: {radius}px;\n"
        f"box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);"
    )

print(create_glassmorphism(16, 0.25, 0.40, 16))

Java

public class GlassmorphismGenerator {
    public static String createGlassmorphism(int blur, double opacity, double borderOpacity, int radius) {
        return "background: rgba(255, 255, 255, " + opacity + ");\n" +
               "-webkit-backdrop-filter: blur(" + blur + "px);\n" +
               "backdrop-filter: blur(" + blur + "px);\n" +
               "border: 1px solid rgba(255, 255, 255, " + borderOpacity + ");\n" +
               "border-radius: " + radius + "px;\n" +
               "box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);";
    }

    public static void main(String[] args) {
        System.out.println(createGlassmorphism(16, 0.25, 0.40, 16));
    }
}