Cloudflare Turnstile

TL;DR

It is Cloudflare's attempt at a CAPTCHA killer that ironically uses invasive WebGL fingerprinting to prove you are human.

Who is this actually for?

Web developers who hate reCAPTCHA but still need to stop bot spam, even if it means annoying privacy-conscious users.

The Good

• Much better user experience than clicking on endless crosswalks and traffic lights.
• Easy integration if you are already locked into the Cloudflare ecosystem.

The Catch (Potential Downsides)

Privacy advocates will hate the WebGL data collection used for device fingerprinting. It might break for users running hardened browsers or privacy extensions that block hardware probes.