CSS Glassmorphism Generator

What is Glassmorphism?

Glassmorphism is a design trend that mimics frosted glass: a semi-transparent surface that blurs whatever is behind it, with a subtle light border to catch the edge. Popularized by modern operating systems, it creates a sense of depth and layering while keeping interfaces light and elegant.

Our CSS Glassmorphism Generator builds this effect using the backdrop-filter property for the blur, an adjustable transparency, rounded corners, and an optional border — all previewed over a vivid gradient so you can see the glass come to life.

How to Create the Effect

• Adjust the blur to control how frosted the glass appears
• Set transparency to balance see-through with legibility
• Tune the corner radius for soft, modern edges
• Toggle a subtle border to catch the light at the edges
• Copy the CSS, including the -webkit- prefix for Safari

The backdrop-filter Property

The magic of glassmorphism is the backdrop-filter property, which applies a filter — here, a blur — to the area behind an element rather than the element itself. This is what makes content behind the glass appear frosted. It requires a semi-transparent background to be visible.

Because Safari needs the -webkit-backdrop-filter prefix, this tool includes it automatically so your effect works across browsers. Note that the effect only shows when there is content or color behind the element to blur.

Designing with Glassmorphism

Glassmorphism works best over colorful or image backgrounds, where the blur has something interesting to reveal. It is popular for cards, navigation bars, modals, and login forms. Keep text contrast high enough to remain readable over the blurred, semi-transparent surface. This tool generates the effect entirely in your browser.

Key Features at a Glance

• Adjustable backdrop blur for the frosted effect
• Transparency control to balance see-through and legibility
• Corner radius and optional light-catching border
• Live preview over a vivid gradient background
• Includes the -webkit- prefix for Safari automatically
• Runs in your browser — free, private, and offline-capable

Why backdrop-filter Needs Transparency and a Background

Glassmorphism depends on the backdrop-filter property, which is unusual: instead of filtering the element itself, it filters whatever is rendered behind the element. A blur applied this way frosts the content showing through, which is exactly the glass effect. The catch is that the element must be at least partly transparent for any of that backdrop to be visible — a fully opaque surface hides everything and the blur has nothing to show.

It also means the effect only appears when there is something behind the element worth blurring. Over a flat white page, frosted glass looks like a plain translucent panel; over a colorful gradient or a photograph, it comes alive. That is why this tool previews the effect over a vivid gradient. Browser support is good, but Safari requires the -webkit-backdrop-filter prefix, which the generator includes for you so the result works across browsers.

Tips for Convincing Glass

• Place glass over colorful or image backgrounds so the blur has something to reveal
• Keep enough opacity that text on the glass stays readable
• Add a subtle light border to catch the panel's edge
• Use generous corner rounding for a soft, modern feel
• Test in Safari to confirm the -webkit- prefix is doing its job

Why Choose Our CSS Glassmorphism Generator?

Our glassmorphism generator is free with no signup, no limits, and no subscription. It runs entirely in your browser, so the preview and CSS update instantly, work offline, and stay private — nothing is uploaded.

It is one of more than 200 free tools on ToopTools, and you can pin it to your My Workspace, a personalized workspace where you keep the tools you use most in a single dashboard. Beside the gradient and shadow generators, it lets you design modern frosted-glass surfaces and copy cross-browser CSS without leaving your workspace.

Common Use Cases

Glassmorphism is popular for cards, navigation bars, modals, and login forms layered over colorful backgrounds or hero images. The frosted surface creates a sense of depth and hierarchy while keeping the interface feeling light and airy, which is why modern operating systems use it so heavily.

Designers use the effect for overlay panels that need to feel connected to the content behind them rather than blocking it out completely. Marketing and product teams use it on landing pages to give a contemporary, premium impression. This tool makes it easy to dial in the blur and transparency and copy CSS that works in every major browser.

Is the CSS Glassmorphism Generator free?

Yes. It is completely free with no account, no sign-up, and no usage limits. Design and copy as many glass effects as you like at no cost.

Why is my glassmorphism effect not showing?

Usually the element is fully opaque or has nothing behind it. backdrop-filter only blurs content behind a partly transparent element, so lower the opacity and place the panel over a colorful or image background for the frosted look to appear.

Does glassmorphism work in Safari?

Yes, but Safari requires the -webkit-backdrop-filter prefix. This tool includes that prefix automatically alongside the standard property, so the effect renders correctly across Chrome, Edge, Firefox, and Safari.

Is glassmorphism accessible?

It can be if you keep text contrast high. Because the surface is translucent, busy backgrounds can reduce legibility, so increase opacity or darken the panel until any text on the glass comfortably meets contrast guidelines.

Does the blur affect performance?

backdrop-filter blur is GPU-accelerated in modern browsers and performs well for a few elements. Applying it to many large, overlapping surfaces at once can be heavier, so use it for key panels rather than across the entire page.

Is my design kept private?

Yes. The effect and its CSS are generated entirely in your browser, so nothing is uploaded. The tool is private and works without an internet connection.

How do I create a glassmorphism effect in CSS?

Adjust the blur, transparency, and border, and the live preview shows the frosted-glass effect over a background. When it looks right, copy the generated CSS — including the backdrop-filter — and apply it to your card or panel.

Does the glassmorphism generator work offline?

Yes. The effect and its CSS are generated entirely in your browser, so once the page has loaded the tool works without an internet connection, and nothing you design is uploaded. You can build glass effects privately on your own device.