reCAPTCHA is a CAPTCHA-like system designed to establish that a computer user is human and, at the same time, assist in the digitization of books.

Quick start

After you obtained your keys from Google Recaptcha website, you will need to add this script in the head section:

<script src=''></script>

After that, all you need to do is to initialize the recaptcha by adding the next element into your form:


<div class="g-recaptcha mt-1" data-sitekey="YOUR_SITE_KEY"></div>


All pages that contain a contact form are fully functional, meaning they send email via AJAX and PHP Mailer. Also, we implemented the recaptcha functionality, but of course it is optional and you should use it where you see fit.

Open example page