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The Blazor Spinner 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 such as Tailwind CSS, Bootstrap 5, Bootstrap 4, Bootstrap, Material, Fabric, and High Contrast. Simplify theme customization either by overriding the existing SASS styling or creating custom themes by using the Theme Studio application.

Descriptive labels

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

Various sizes

Adjust the size of the Blazor Spinner 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’s visibility easily through a two-way binding property and asynchronous methods.


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

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