Documentation Index
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Add Google reCAPTCHA v2 to your landing pages in LanderLab to protect your forms from bots and spam submissions using a visible “I’m not a robot” checkbox challenge.
What is reCAPTCHA v2?
Google reCAPTCHA v2 adds a visible checkbox to your form that asks visitors to confirm they are human by clicking “I’m not a robot.” When a visitor looks suspicious, Google may also display an image recognition challenge (such as selecting traffic lights or crosswalks) before allowing the form to be submitted. Unlike reCAPTCHA v3, which runs entirely in the background, v2 requires a visible interaction. This makes it a good fit for forms where you want users to be explicitly aware that bot protection is in place. LanderLab handles the reCAPTCHA v2 script installation for you. Once the integration is added with your Site Key, the checkbox widget is automatically added to your landing page forms.Once you add a reCAPTCHA v2 integration, it is saved globally in your account. You can reuse it across multiple landing pages without entering the details again.
Before You Start
Before adding reCAPTCHA v2 in LanderLab, you need to register your site in the Google reCAPTCHA Admin Console and get your Site Key. This takes about 2 minutes.Go to the reCAPTCHA Admin Console
Open the Google reCAPTCHA Admin Console and sign in with your Google account.
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 v2”). |
| reCAPTCHA type | Select Challenge (v2), then choose “I’m not a robot” Checkbox. |
| Domains | Enter your landing page domain (e.g. yourdomain.com, without https:// or www). |
How to Add reCAPTCHA v2 in LanderLab
Go to your landing page
Navigate to Landing Pages and click the name of the landing page where you want to enable reCAPTCHA v2 protection.
Select reCAPTCHA v2
From the list of available integrations, find reCAPTCHA v2 (labeled as “Protect your forms from bots with reCAPTCHA v2”) and click on it. A configuration form will appear.
Fill in the required fields
Enter the following details:
| Field | Description |
|---|---|
| Name | A label to identify this integration (e.g. “reCAPTCHA v2”). Helps you recognize it when reusing across pages. |
| Site Key | The Site Key from your Google reCAPTCHA registration (e.g. 6LcX...). |
| Size | Choose how the checkbox widget appears on your form: Normal (standard size) or Compact (smaller, better for tight layouts). |
Click Add reCAPTCHA v2
Click the Add reCAPTCHA v2 button to save the integration. LanderLab stores this globally, so you can connect it to other landing pages later without re-entering the details.
Connect reCAPTCHA v2 to Another Landing Page
Since reCAPTCHA v2 integrations are saved globally, you do not need to create a new one for every landing page.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 v2 integration.
Add Integration
Click Add Integration. You will see your previously saved reCAPTCHA v2 configurations listed. Select the one you want to connect.
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.
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.
Normal vs. Compact Size
The Size option controls how the reCAPTCHA checkbox widget is displayed on your form.- Normal - The standard widget size. This is the default and works well for most landing page layouts.
- Compact - A smaller version of the widget. Use this if your form has limited horizontal space or if the normal widget feels too large for your design.
Tips for reCAPTCHA v2
- 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, the widget will not load.
- reCAPTCHA v2 vs. v3 - reCAPTCHA v2 shows a visible checkbox that visitors must interact with. If you prefer a fully invisible experience where real visitors never see a challenge, consider using reCAPTCHA v3 instead.
- Test after publishing - After publishing your landing page, open it in a browser and confirm the reCAPTCHA checkbox appears on your form before going live with traffic.