How to Make a Glass/Blur Effect Overlay using HTML and CSS?

Last Updated : 25 Sep, 2024

To give a background blur effect on an overlay, the CSS backdrop-filter: blur() property is used with ::before pseudo-element. The backdrop-filter: blur() property gives the blur effect on the box or any element where it is desired and “before” is used to add the blurred background without applying any extra markup.

HTML Code: In this section, we will use HTML code to design the basic structure of the web page.

HTML

<!DOCTYPE html> <html>  <head>     <meta charset="utf-8">     <title>         How to make a CSS glass/blur         effect work for an overlay?     </title>          <link rel="stylesheet" href= "https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">  </head>  <body>     <section>         <div class="layout">             <h1>GeeksforGeeks</h1>                          <p class="py-2">                 It is a computer science portal for geeks.                 It is a platform where you can learn and                 practice programming problems. It contains                 programming content, web technology content,                 and some other domain content also.             </p>              <button class="btn btn-danger">                 Button             </button>         </div>     </section> </body>  </html>

CSS Code: In this section, we will use some CSS properties to make a glass/blur effect overlay using HTML and CSS.

CSS

/* CSS code */ body {     margin: 0;     padding: 0; }  section {     display: flex;     background: #001923;     justify-content: center;     align-items: center;     width: 100%;     min-height: 100vh; }  section .layout {     position: relative;     width: 100%;     max-width: 600px;     padding: 50px;     box-shadow: 0 10px 20px rgba(0, 0, 0, .1);     background: rgba(255, 255, 255, 0.1);     backdrop-filter: blur(20px);     border: 1px solid rgba(255, 255, 255, 0.25);     border-radius: 10px; }  section .layout::before {     content: '';     position: absolute;     top: 0;     bottom: 0;     left: 0;     right: 0; }  section .layout h1 {     position: relative;     text-align: center;     color: rgb(36, 168, 36); }  section .layout p {     position: relative;     color: #fff; }  section .layout button {     position: relative; }

Combined Code: In this section, we will combine the above two sections of code (HTML and CSS code) to make a glass/blur effect overlay.

HTML

<!DOCTYPE html> <html>  <head>     <meta charset="utf-8">     <title>         How to make a CSS glass/blur         effect work for an overlay?     </title>      <link rel="stylesheet" href= "https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">      <style>         body {             margin: 0;             padding: 0;         }          section {             display: flex;             background: #001923;             justify-content: center;             align-items: center;             width: 100%;             min-height: 100vh;         }          section .layout {             position: relative;             width: 100%;             max-width: 600px;             padding: 50px;             box-shadow: 0 10px 20px rgba(0, 0, 0, .1);             background: rgba(255, 255, 255, 0.1);             backdrop-filter: blur(20px);             border: 1px solid rgba(255, 255, 255, 0.25);             border-radius: 10px;         }          section .layout::before {             content: '';             position: absolute;             top: 0;             bottom: 0;             left: 0;             right: 0;         }          section .layout h1 {             position: relative;             text-align: center;             color: rgb(36, 168, 36);         }          section .layout p {             position: relative;             color: #fff;         }          section .layout button {             position: relative;         }     </style> </head>  <body>     <section>         <div class="layout">             <h1>GeeksforGeeks</h1>              <p class="py-2">                 It is a computer science portal for geeks.                 It is a platform where you can learn and                 practice programming problems. It contains                 programming content, web technology content,                 and some other domain content also.             </p>              <button class="btn btn-danger">                 Button             </button>         </div>     </section> </body>  </html>

Output:

HTML is the foundation of web pages and is used for webpage development by structuring websites and web apps. You can learn HTML from the ground up by following this HTML Tutorial and HTML Examples.

CSS is the foundation of web pages and is used for webpage development by styling websites and web apps. You can learn CSS from the ground up by following this CSS Tutorial and CSS Examples.

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How to Make a Glass/Blur Effect Overlay using HTML and CSS?

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