FreeCAPTCHA is a new CAPTCHA system for privacy-focused websites. No JS, minimal dependencies, all on-premise (no 3rd party APIs required). Here's a minimalistic implementation, to show you what it looks like: initial page Let's try selecting an *incorrect* option: wrong select And we submit, to see what happens: wrong result Okay, what if select the *correct* image? right select And smash that submit button to see where it goes! right result Viola! Although the concept works, it's mostly just that, a proof of concept. The code needs to be modularized into a library that can be loaded into a little iframe for easy integration