Introduction

SimpleCaptcha is a framework used in generating CAPTCHA image/answer pairs for Java (J2EE, Grails, JavaFX, etc.). It is intended to be simple to implement and provide sensible defaults, while having the ability to be customized in a wide variety of ways. Example implementations are provided in Java/J2EE and Grails.

Here are some example images which were generated by SimpleCaptcha:

Internationalization is supported, with Chinese CAPTCHAs provided out-of-the-box.

SimpleCaptcha is open source software under the BSD License.