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The Blazor Spinner component denotes when long-running tasks are ongoing, tasks for which there is no information about their progress. The component provides circular progress indicators without interaction capabilities.

To show users the progress information of a task, the Blazor ProgressBar component should be used, instead.

Built-in types

Several built-in, Sass-based themes are available: Tailwind CSS, Bootstrap 5, Bootstrap 4, Bootstrap, Material, Fabric, and high contrast. Simplify theme customization by either overriding the existing Sass styling or creating custom themes using the Theme Studio application.

Descriptive labels

Include labels with the Blazor Spinner component that give additional, meaningful information about the task currently running.

Spinner intergration

The Spinner component can be rendered with other Blazor components, such as the Tab component. To render the Spinner inside the Tab component, the Spinner is set as a child of the Tab component, and the Spinner can be shown or hidden when switching between tabs.

Blazor Spinner intergration

Various sizes

Adjust the size of the Blazor Spinner component to large, medium, or small to help integrate it within other Blazor components.


Using a template, users can create a custom Blazor loading component.


You can control the Blazor Spinner component’s visibility easily through a two-way binding property and asynchronous methods.


The default appearance of the Blazor Spinner component can be customized by changing its color and stroke width. Also, you can set the z-index for Blazor spinners dynamically based on application scenarios.

Blazor Spinner code example

Easily get started with the Blazor Spinner using a few simple lines of C# code as demonstrated below. Also explore our Blazor Spinner example that shows you how to render and configure the Blazor Spinner.

@using Syncfusion.Blazor
@using Syncfusion.Blazor.Buttons
@using Syncfusion.Blazor.Spinner
    <SfButton @onclick="@ClickHandler">Show/Hide Spinner</SfButton>
    <div id="container">
        <SfSpinner @bind-Visible="@VisibleProperty">
    private bool VisibleProperty { get; set; } = false;
    private async Task ClickHandler()
        this.VisibleProperty = true;
        await Task.Delay(2000);
        this.VisibleProperty = false;

Blazor Components – 80+ UI and DataViz Components

Frequently Asked Questions

  • Show indeterminate progress indicators.
  • Utilize built-in support for theme-based spinners.
  • Customize the Spinner appearance, labels, size, type, z-index, and overlay.
  • Add descriptive labels to provide meaningful information about the task currently running.
  • Create a custom loading component using templates.
  • Control the Spinner with simple configuration and API.
  • One of the best Blazor Spinner components on the market that offers a feature-rich UI to interact with the software.
  • Industry-standard themes are included: Material, Fabric, and Bootstrap.
  • Simple configuration and API.
  • Supports all modern browsers.
  • Touch-friendly and responsive UI.
  • Extensive demos, documentation, and videos to learn quickly and get started with Blazor Spinner.

You can find our Blazor Spinner demo here.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue and five or fewer developers.

A good place to start would be our comprehensive getting started documentation.

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