CSS Spinner

Classic circular loading spinner. The simplest and most recognizable loading indicator. Customize size, border width, and color.

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #333;
  border-top-color: #8b5cf6;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}