The Telerik UI for ASP.NET Core Captcha component serves as a security validation step when completing a form or making a request. It is meant to protect your application from malicious computer logins and ensure that a human is trying to request, submit or access the information. The component prompts the user to write the combination of symbols (letters and numbers) in the displayed image for verification.
Telerik UI for ASP.NET Core comes with a complete server-side API. With simple API calls, you can configure all features of the ASP.NET Core Captcha control. Since the server wrappers output JavaScript, you also have full access to the client-side API for maximum control in the browser.
Explore the ASP.NET Core Captcha API demo
The Telerik UI for ASP.NET Core Captcha is one of the many UI components in the suite with out-of-the-box support for keyboard navigation. Users can easily navigate the component using a combination of keyboard buttons to focus on the textbox, change the image or even control the sound volume.
The Captcha validation component has 20+ built-in themes and swatches. Explore the Default (our own styling), Material (based on the Material Design guidelines), Bootstrap (which looks like the Bootstrap styling to integrate better) and Fluent (based on Microsoft Fluent UI) themes and choose the swatch that meets your design requirements. You can easily customize any theme with a few lines of CSS or create a new one with the Progress SASS ThemeBuilder application to exactly match your colors and branding.