> ## Documentation Index
> Fetch the complete documentation index at: https://docs.landerlab.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Enable Google reCAPTCHA v3 for Form Protection

> Enable Google reCAPTCHA v3 to protect your landing page forms from bots and spam without any visible challenge or interruption for visitors.

> Add Google reCAPTCHA v3 to your landing pages in LanderLab to protect your forms from bots and spam without asking visitors to solve any challenge or click any checkbox.

## What is reCAPTCHA v3?

Google reCAPTCHA v3 runs entirely in the background. It analyzes each visitor's behavior on your page and assigns a score between 0.0 and 1.0, where 1.0 means very likely human and 0.0 means very likely a bot. This score is used to decide whether a form submission should be accepted or blocked.

Visitors never see a challenge, a checkbox, or any visible widget. For real users, the experience is completely seamless. Bot submissions are blocked silently.

LanderLab handles the reCAPTCHA v3 script installation and server-side token verification for you. Once the integration is added with your Site Key and Secret Key, reCAPTCHA v3 is automatically active on your landing page forms.

<Note>
  Once you add a reCAPTCHA v3 integration, it is saved **globally** in your account. You can reuse it across multiple landing pages without entering the details again.
</Note>

***

## Before You Start

Before adding reCAPTCHA v3 in LanderLab, you need to register your site in the Google reCAPTCHA Admin Console and get both your **Site Key** and **Secret Key**. This takes about 2 minutes.

<Steps>
  <Step title="Go to the reCAPTCHA Admin Console">
    Open the [Google reCAPTCHA Admin Console](https://www.google.com/recaptcha/admin) and sign in with your Google account.
  </Step>

  <Step title="Register a new site">
    Click the **+** button (or **Create**) to register a new site. Fill in the following:

    | Field              | What to enter                                                                        |
    | :----------------- | :----------------------------------------------------------------------------------- |
    | **Label**          | A name to identify this key (e.g. "LanderLab - reCAPTCHA v3").                       |
    | **reCAPTCHA type** | Select **Score based (v3)**.                                                         |
    | **Domains**        | Enter your landing page domain (e.g. `yourdomain.com`, without `https://` or `www`). |
  </Step>

  <Step title="Accept and submit">
    Accept the reCAPTCHA Terms of Service and click **Submit**.
  </Step>

  <Step title="Copy both keys">
    After submitting, Google will display your **Site Key** and **Secret Key**. Copy both. You will need both to add reCAPTCHA v3 in LanderLab.

    | Key            | What it does                                                                                               |
    | :------------- | :--------------------------------------------------------------------------------------------------------- |
    | **Site Key**   | Loaded on your page to run the reCAPTCHA challenge in the visitor's browser. This is a public key.         |
    | **Secret Key** | Used on the server side to verify the visitor's token with Google. This is a private key - keep it secure. |

    <Warning>
      Never share your **Secret Key** publicly. Unlike the Site Key, the Secret Key is a private credential used for server-side verification. Keep it out of any public code, repositories, or shared documents.
    </Warning>
  </Step>
</Steps>

***

## How to Add reCAPTCHA v3 in LanderLab

<Steps>
  <Step title="Go to your landing page">
    Navigate to **Landing Pages** and click the **name of the landing page** where you want to enable reCAPTCHA v3 protection.
  </Step>

  <Step title="Open the Integrations tab">
    Click **Add Integration** to open the integrations panel.
  </Step>

  <Step title="Select reCAPTCHA v3">
    From the list of available integrations, find **reCAPTCHA v3** (labeled as "Protect your forms from bots with reCAPTCHA v3") and click on it. A configuration form will appear.
  </Step>

  <Step title="Fill in the required fields">
    Enter the following details:

    | Field          | Description                                                                                                               |
    | :------------- | :------------------------------------------------------------------------------------------------------------------------ |
    | **Name**       | A label to identify this integration (e.g. "reCAPTCHA v3"). Helps you recognize it when reusing across pages.             |
    | **Site Key**   | The public Site Key from your Google reCAPTCHA registration (e.g. `6LcX...`).                                             |
    | **Secret Key** | The private Secret Key from your Google reCAPTCHA registration (e.g. `6LcX...`). Used for server-side token verification. |
  </Step>

  <Step title="Click Add reCAPTCHA v3">
    Click the **Add reCAPTCHA v3** button to save the integration. LanderLab stores this globally, so you can connect it to other landing pages later without re-entering the details.
  </Step>

  <Step title="Publish your landing page">
    Click **Publish** or **Republish** your landing page to activate reCAPTCHA v3 on your forms. The protection runs silently in the background. Visitors will not see any visible widget or challenge.
  </Step>
</Steps>

<Frame>
  <img src="https://mintcdn.com/landerlab-babdc23f/HMKrQYFyvSl4tVFf/images/recaptcha-v3.png?fit=max&auto=format&n=HMKrQYFyvSl4tVFf&q=85&s=b5db20d00f86b2aa9522e2848872a0b9" alt="Recaptcha V3" width="1920" height="991" data-path="images/recaptcha-v3.png" />
</Frame>

***

## Connect reCAPTCHA v3 to Another Landing Page

Since reCAPTCHA v3 integrations are saved globally, you do not need to create a new one for every landing page.

<Steps>
  <Step title="Open a different landing page">
    Go to **Landing Pages** and click the name of the landing page where you want to use the same reCAPTCHA v3 integration.
  </Step>

  <Step title="Add Integration">
    Click **Add Integration**. You will see your previously saved reCAPTCHA v3 configurations listed. Select the one you want to connect.
  </Step>

  <Step title="Select variants (if applicable)">
    If your landing page has multiple **A/B test variants**, a modal will appear asking you to choose which variants should use this integration. Select the variants you want and confirm.

    <Note>
      The variant selection modal only appears when your landing page has more than one active variant. If there is only one variant, the integration is applied automatically.
    </Note>
  </Step>

  <Step title="Save and publish">
    Click **Save**, then **Publish** or **Republish** your landing page to activate reCAPTCHA v3 on the selected variants.
  </Step>
</Steps>

***

## reCAPTCHA v2 vs. reCAPTCHA v3

Not sure which version to use? Here is a quick comparison:

| Feature                 | reCAPTCHA v2                                   | reCAPTCHA v3                                    |
| :---------------------- | :--------------------------------------------- | :---------------------------------------------- |
| **Visitor experience**  | Visible checkbox, may show image puzzles       | Fully invisible, no interaction required        |
| **Fields required**     | Site Key only                                  | Site Key and Secret Key                         |
| **Widget size options** | Normal and Compact                             | No visible widget                               |
| **Best for**            | Forms where visible verification is acceptable | Forms where a seamless experience is a priority |

Both versions protect your forms from bots and spam. reCAPTCHA v3 is generally preferred for lead generation landing pages because it does not add any friction for real visitors.

***

## Tips for reCAPTCHA v3

* **Make sure your domain matches** - The domain you entered in the Google Admin Console must match the domain your landing page is published on. If they do not match, reCAPTCHA will not work correctly.
* **Both keys are required** - Unlike v2, reCAPTCHA v3 requires both the Site Key and the Secret Key. Make sure you copy both from the Google Admin Console before setting up the integration in LanderLab.
* **You will not see a visible widget** - reCAPTCHA v3 is fully invisible. If you want confirmation it is working, check your Google reCAPTCHA Admin Console for analytics data after a few test submissions.