26/05/2026
Typing blurry letters. Selecting traffic lights. Clicking “I’m not a robot.” That is CAPTCHA doing its job.
CAPTCHA is a website’s way of checking whether a visitor is human or a bot.
It helps reduce spam, fake accounts, and automated attacks.
The name stands for “Completely Automated Public Turing test to tell Computers and Humans Apart.”
In other words, it’s a test that should be easy for humans but difficult for bots. Some CAPTCHA systems do more than block bots. They also help create AI training data by asking people to identify words, images, or objects.
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