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Table of Contents
1. Basic HTML Structure
2. Style the Spinner with CSS
How it works:
3. Customize the Spinner
4. Centering the Spinner (Optional)
Final Notes
Home Web Front-end CSS Tutorial How to create a loading spinner with CSS?

How to create a loading spinner with CSS?

Jul 25, 2025 am 04:35 AM

Creating a CSS loading spinner requires only a div element as the HTML structure. 2. Use CSS to set width, height, border, rounded corners and animation properties, and achieve rotation effect by changing the border color and applying 360-degree rotation animation. 3. Customize size, speed, color and border thickness to match design requirements. 4. Center the rotator in the container or center of the screen through the flex layout. In the end, a lightweight, modern browser-compatible loading indicator can be achieved with just a small amount of code, which is suitable for AJAX loading, page transition and other scenarios.

How to create a loading spinner with CSS?

Creating a loading spinner with CSS is simple and doesn't require any images or JavaScript. You can build a smooth, animated spinner using just HTML and CSS. Here's how to make a basic circular spinner that you can customize and reuse.

How to create a loading spinner with CSS?

1. Basic HTML Structure

Start with a simple div element that will act as the spinner:

 <div class="spinner"></div>

That's all the HTML you need — one element to style and animate.

How to create a loading spinner with CSS?

2. Style the Spinner with CSS

Here's a clean, modern spinner using a border and CSS animation:

 .spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3; /* Light gray */
  border-top: 4px solid #3498db; /* Blue top for spin effect */
  border-radius: 50%; /* Makes it a circle */
  animation: spin 1s linear infinite; /* Spin animation */
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

How it works:

  • The border creates a circular outline.
  • Only the border-top is colored, so as it rotates, it looks like a spinner.
  • The border-radius: 50% ensures it's a perfect circle.
  • The animation rotates the element 360 degrees continuously.

3. Customize the Spinner

You can easily tweak the spinner to match your design:

How to create a loading spinner with CSS?
  • Size : Change width and height .
  • Speed : Adjust the animation duration (eg, 0.5s for faster).
  • Colors : Modify border and border-top colors.
  • Thickness : Change the border-width .

Example of a smaller, faster spinner:

 .spinner {
  width: 20px;
  height: 20px;
  border: 3px solid #eee;
  border-top: 3px solid #666;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

4. Centering the Spinner (Optional)

To display the spinner in the center of the screen or container:

 .loader-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh; /* Full viewport height */
}

And wrap the spinner:

 
<div class="spinner"></div>

Final Notes

  • This spinner works in all modern browsers.
  • It's lightweight and great for AJAX loading states, page transitions, or button loading indicators.
  • You can reuse the .spinner class anywhere in your app.

Basically, just two elements (one div and a few CSS lines), and you've got a professional-looking loading spinner.

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