CSS Glassmorphism Generator
Glassmorphism is a modern UI design trend that creates a frosted-glass effect by combining transparency, background blur, and subtle borders. It’s commonly used in cards, modals, dashboards, and navigation elements to add depth while keeping interfaces clean and lightweight. When done well, glassmorphism enhances visual hierarchy without overwhelming the underlying content.
This Glassmorphism CSS Generator allows you to visually design glass-style UI elements and instantly generate the corresponding CSS. Use the controls to adjust transparency, blur strength, borders, and border radius, or start with a preset to quickly explore different styles. You can also change the background to see how the glass effect behaves in different contexts.
As you tweak the settings, the live preview updates in real time and the generated CSS is displayed alongside it, ready to copy and use in your projects. Whether you’re prototyping a UI or fine-tuning production styles, this tool helps you create consistent, reusable glassmorphism effects with ease.
CSS Glassmorphism Generator
Glass UI
About the Glassmorphism CSS Generator
Glassmorphism is a design technique inspired by frosted glass surfaces, where interface elements appear semi-transparent while softly blurring the content behind them. This effect is achieved using a combination of translucent backgrounds, backdrop filters, subtle borders, and rounded corners. When used thoughtfully, glassmorphism adds depth and separation to user interfaces without relying on heavy shadows or solid panels.
This Glassmorphism CSS Generator provides a visual way to experiment with these effects and understand how each CSS property contributes to the final result. Instead of guessing values or repeatedly tweaking code, you can adjust transparency, blur intensity, saturation, borders, and border radius using simple controls and see the changes applied instantly in the preview. Presets are included to showcase common glass styles and to give you a solid starting point for further customization.
Because glassmorphism is highly dependent on what sits behind the element, the generator also lets you change the background using colors, gradients, or images. This makes it easier to evaluate readability, contrast, and overall appearance in realistic scenarios. The live preview updates in real time, helping you fine-tune your design before using it in a real project.
As you adjust the settings, the tool generates clean, copy-ready CSS that you can paste directly into your stylesheet. Vendor-prefixed properties are included where necessary to improve browser compatibility. The generated code is intentionally minimal and human-readable, making it easy to adapt, refactor, or convert into CSS variables or utility classes.
Whether you’re designing modern dashboards, cards, modals, or navigation components, this generator helps streamline the process of creating glassmorphism effects that are both visually appealing and practical to use. It’s suitable for quick prototyping as well as for producing production-ready styles that integrate seamlessly into existing projects.
Frequently Asked Questions
What is glassmorphism in CSS?
Glassmorphism is a UI design technique that mimics the appearance of frosted glass. It combines a semi-transparent background, a backdrop-filter: blur() to blur whatever sits behind the element, a subtle border, and soft shadows to create depth and a sense of layering. The result is an element that appears to float above its background while the content beneath shows through in a diffused, blurred form.
What CSS properties are used to create a glassmorphism effect?
The core properties are background set to a semi-transparent colour using rgba() or a low-opacity value, backdrop-filter: blur() to apply the frosted blur to the background behind the element, border set to a translucent white or light colour for the glass edge, and border-radius for the rounded corners typical of the style. A box-shadow with low opacity is often added to reinforce the floating effect.
What does backdrop-filter do in glassmorphism?
backdrop-filter applies a graphical filter to the area behind an element, rather than to the element itself. In glassmorphism, backdrop-filter: blur(Xpx) blurs the content that sits behind the card or panel, creating the frosted-glass look. Without it the element would simply look like a transparent coloured box with no blurring effect. It can also accept other filter functions such as saturate() or brightness(), which are sometimes combined with blur to enhance the glass appearance.
Does backdrop-filter work in all browsers?
backdrop-filter is supported in Chrome, Edge, Safari, and most modern mobile browsers. Firefox had it behind a flag for a long time but has supported it by default since Firefox 103. For the widest compatibility, include the -webkit-backdrop-filter vendor prefix alongside the standard property - this is especially important for older Safari versions. Always test on your target browsers, and consider providing a fallback style (such as a slightly more opaque background) for environments where the property is not supported.
Why is my glassmorphism effect not showing any blur?
The most common reason is that there is nothing behind the element to blur. backdrop-filter only has a visible effect when there is content, an image, or a gradient sitting directly behind the element in the stacking order. If the element is on a flat solid-colour background with nothing else behind it, the blur will appear to do nothing. Make sure your glass element is positioned over a colourful or complex background. Also check that the parent element does not have overflow: hidden set, as this can clip the backdrop-filter effect in some browsers.
How do I make a glassmorphism card in CSS?
Start with a container that has a colourful or gradient background, then position your card element over it. Apply these styles to the card:
background: rgba(255, 255, 255, 0.15); for the translucent fill,
backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); for the blur,
border: 1px solid rgba(255, 255, 255, 0.3); for the glass edge, and
border-radius: 16px; for rounded corners.
Adjust the rgba opacity and blur value to taste - lower opacity and higher blur gives a more frosted appearance, while higher opacity and lower blur looks more like tinted glass.
What background works best with glassmorphism?
Glassmorphism works best over colourful, varied backgrounds such as gradients, photographs, or illustrated scenes. The blur effect is most visually striking when there is a range of colours and edges behind the glass element. Flat, single-colour backgrounds produce little to no visible frosted effect. Vibrant gradient backgrounds - particularly those with contrasting hues - tend to give the most polished result. Avoid very dark or very light near-white backgrounds as they reduce the legibility of text on the glass panel.
How do I ensure text remains readable on a glassmorphism element?
Readability is the most common practical challenge with glassmorphism. Increase the background opacity slightly so the glass panel provides more contrast against whatever sits behind it. Adding a soft text-shadow on light text, or using dark text on a lighter glass panel, both help. Avoid placing text over areas of the background where the colours behind shift dramatically, as this creates inconsistent contrast. Always check your design against WCAG contrast ratio guidelines, especially if the background image or gradient can vary.
Can I use glassmorphism on navigation bars and modals?
Yes, and these are among the most popular use cases. A fixed navigation bar with a glassmorphism style creates an elegant frosted effect as page content scrolls behind it - use position: fixed, a translucent background, and backdrop-filter: blur(). For modals, apply the glass styles to the modal panel itself and place it over a slightly dimmed overlay. Because glassmorphism is visually busy by nature, it works best when used selectively - applying it to key UI components like cards, navbars, and modals rather than to every element on the page.
What is the difference between opacity and background rgba in glassmorphism?
Using opacity on an element makes the entire element - including its text, borders, and child elements - transparent. This is almost never what you want for glassmorphism, as your card content would also become see-through.
Using rgba() or hsla() in the background property makes only the background colour translucent while leaving the element's content, borders, and children at full opacity. Always use rgba() on the background property rather than opacity on the element itself when building glassmorphism effects.