A comprehensive collection of CAPTCHA implementations for security testing and development purposes
Simple arithmetic challenges that users must solve to prove they're human.
Classic distorted text recognition challenge with visual noise.
Drag the slider to complete a puzzle piece verification.
Rotate and arrange puzzle pieces to complete the image.
Select all images matching a specific category or object.
Invisible trap fields that catch automated bots.
Logic and common sense questions only humans can answer.
Listen and type spoken letters or numbers for accessibility.
reCAPTCHA-style "I'm not a robot" checkbox verification.
Rotate an image to its correct orientation to verify.
Match or select specific emojis from a set.
Behavioral analysis based on interaction timing and patterns.