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Top Free CAPTCHA Sources

Here is a collection of Free CAPTCHA Sources and services which you can easily integrate into your website using JavaScript or PHP.

1. Securimage (PHP)

Free CAPTCHA SourcesSecurimage is an open-source free PHP CAPTCHA script for generating complex images and CAPTCHA codes to protect forms from spam and abuse. It can be easily added into existing forms on your website to provide protection from spam bots.

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2. JCaptcha (Java)

Free CAPTCHA Sources

JCAPTCHA stands for Java Completely Automated Public Test to tell Computers and Humans Apart. The open source Java framework for captcha definition and integration

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3. jQuery AJAX PHP Captcha

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Setup a working jQuery AJAX PHP Captcha in minutes. Integrated it with jQuery Validate plugin with a remote ajax request to check if the captcha is correct.

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4. Captchas.net – Free CAPTCHA Service

4.pngDownload Link

5. Visual and Audio PHP CAPTCHA Generation Class

5PhpCaptcha is a library for generating visual and audio CAPTCHAs (completely automated public Turing test to tell computers and humans apart).

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6. Cool PHP CAPTCHA

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7. Quick CAPTCHA 1.0 (PHP)

7Download Link

8. Simple Javascript CAPTCHA

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9. CAPTCHA Service – Web Form Spam Protection

9Download Link

10. Free CAPTCHA Form-To-Email Script

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11. hOOmanTest: a MooTools bot filtering “captcha” class

11Download Link

12. s3Capcha jQuery plugin

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13. Ajax Stylish Captcha and Contact Form using JQuery and PHP

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14. jQuery Real Person

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15. reCaptcha style Captcha with JQuery and PHP

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