On Contact Form 7 4.3 and greater reCAPTCHA is the standard CAPTCHA solution.
Don’t confuse reCAPTCHA with Really Simple CAPTCHA, which was the default CAPTCHA solution prior to 4.3. Really Simple CAPTCHA is a WordPress plugin I’ve created and maintained for 8 years. reCAPTCHA is Google’s service, and has tremendous advantages over Really Simple CAPTCHA.
To get started with reCAPTCHA, you need a Google account and to register your site for an API key pair.
Screen shot of Google reCAPTCHA admin page
- Go to Google’s reCAPTCHA admin page.
- Register your site.
- Get a site key and secret key.
Copy the key pair into the WordPress admin screen of the site you registered.
- Go to the admin menu Contact > Integration.
- Find reCAPTCHA panel and click Configure Keys.
- Copy the site key and secret key into the fields and save them.
Lastly, put a placeholder for a reCAPTCHA widget (
[recaptcha]) into your contact form content.
[recaptcha] placeholder is a form-tag, and like other form-tags, it supports several options.
||The color theme of the widget. Available values are dark and light. The default value is light.|
||The size of the widget. Available values are compact and normal. The default value is normal.|