reCAPTCHA knowledge base

How to detect reCAPTCHA version V2 / V3 / Enterprise?

reCAPTCHA V2 also known as I'm not a robot reCAPTCHA is a very popular type of captcha that looks like this:
reCAPTCHA V3 is the newest type of captcha from Google. It has no challenge so there is no need for user interaction. Instead it uses a "humanity" rating - score that looks like this

How to get reCAPTCHA sitekey?

  1. 1.
    Look at the element's code at the page where you found reCAPTCHA
2. Find a link that begins with or find data-sitekey parameter
reCAPTCHA site key string always starts with "6L" symbols and always has 40 symbols length
Regular expression 6L[a-zA-Z0-9-_]{38}