Imageless Captcha

Unlike almost all CAPTCHA systems around, Imageless Captcha works without the need of an image processing library on the server-side.

Imageless Captcha will generate a random number and print it on the page as its English spoken form.

To validate the form and submit it, a user will only have to write the number displayed in the CAPTCHA field.

While this might be easy-to-medium difficulty for hackers to crack, the benefit of using Imageless Captcha resides in an lightweight footprint on the code and an easy implementation procedure.

Two demos, for the PHP and JavaScript versions, are included with the Imageless Captcha standard package.