NoBot - PHP Image Captcha Bundle

NoBot - PHP Image Captcha Bundle

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NoBot CAPTCHA generator is a form security solution using Captcha challenges, that are easy for humans but hard for bots, to prevent automated page posting. Bots are kept from accessing protected website functionality using generated Captcha images specifically designed to be out of reach of computer vision and OCR technologies.

Why NoBot?

BotDetect is unique among Captcha generators in offering many Captcha image and sound styles. While each of them is easily comprehensible to human users, randomly using multiple Captcha generation algorithms makes the generated Captcha challenge extremely difficult to pass automatically.


  • 20 secure & readable Captcha image styles
  • Custom Captcha image size, format, color scheme
  • Custom Captcha code length, style, character set
  • Custom font for Captcha image text

Captcha Image Samples

Vintage Captcha Image

Target Captcha Image

Sun & Warm Air Captcha Image

Spider Web Captcha Image

Sliced Captcha Image

Radar Captcha Image

Party Captcha Image

Shadow Captcha Image

Plain Captcha Image

Overlap Captcha Image

Jailed Negative Captcha Image

Jailed Captcha Image

Overlap Negative Captcha Image

Noisy Captcha Image

Bandage Capthca Image

Bloodstain Captcha Image

Bullets Captcha Image

Caught in the web Captcha Image

Big Brother Captcha Image

Finger Print Captcha Image

Update Log

    20.11.2017 - Initial Upload


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