A field guide to CAPTCHA types and how they break

FuckCaptcha is an open-source reference guide that documents different CAPTCHA types, their vulnerabilities, and known approaches to solving them, intended for educational and authorized security research purposes. The guide catalogs numerous CAPTCHA systems including reCAPTCHA variants, Cloudflare, hCaptcha, and others, organizing them by category with difficulty scales and documented tools for comparison. The project emphasizes responsible use within authorized environments and respect for privacy and terms of service.