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.

Features

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

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Target Captcha Image

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Sun & Warm Air Captcha Image

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Spider Web Captcha Image

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Sliced Captcha Image

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Radar Captcha Image

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Party Captcha Image

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Shadow Captcha Image

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Plain Captcha Image

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Overlap Captcha Image

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Jailed Negative Captcha Image

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Jailed Captcha Image

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Overlap Negative Captcha Image

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Noisy Captcha Image

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Bandage Capthca Image

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Bloodstain Captcha Image

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Bullets Captcha Image

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Caught in the web Captcha Image

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Big Brother Captcha Image

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Finger Print Captcha Image

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Update Log

    20.11.2017 - Initial Upload

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NoBot - PHP Image Captcha Bundle