[Home](./index.md) > [@firebase/auth](./auth.md) > [RecaptchaVerifier](./auth.recaptchaverifier.md) ## RecaptchaVerifier class An [reCAPTCHA](https://www.google.com/recaptcha/)-based application verifier. Signature: ```typescript export declare class RecaptchaVerifier implements ApplicationVerifierInternal ``` Implements: ApplicationVerifierInternal ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(containerOrId, parameters, authExtern)](./auth.recaptchaverifier._constructor_.md) | | Constructs a new instance of the RecaptchaVerifier class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [type](./auth.recaptchaverifier.type.md) | | (not declared) | The application verifier type. | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [clear()](./auth.recaptchaverifier.clear.md) | | Clears the reCAPTCHA widget from the page and destroys the instance. | | [render()](./auth.recaptchaverifier.render.md) | | Renders the reCAPTCHA widget on the page. | | [verify()](./auth.recaptchaverifier.verify.md) | | Waits for the user to solve the reCAPTCHA and resolves with the reCAPTCHA token. |