A CAPTCHA (Completely Automated Public Turing to tell Computers from Humans Apart) is a program that can generate and grade tests that:
- Most humans can pass.
- Current computer programs cannot pass.
For example, humans can read distorted text but current computer programs cannot.
| Ratings | Utility |
Consistency |
Documentation |
Examples |
Tests |
Videos |
Overall |
Rank |
| All time: |
Good (80.7%) |
Good (81.1%) |
Sufficient (70.1%) |
Sufficient (72.5%) |
- |
- |
Sufficient (62.7%) |
501 |
| Month: |
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| Link |
Description |
| Demo |
Demo of the newest Version |