This is designed as a proof of concept only. The goal is to achieve a Captcha system that is extremely easy to read for any human user but complicated for a bot to interpret.
This demonstration renders the text of your choice in nothing more than CSS styles. While it would be very easy for any OCR software to interpret the end result, there is no easy way of a spam bot seeing the image, therefore providing some protection against them whilst remaining unquestionably legible to most people (unlike some Captcha systems most notably that used by MSN Hotmail!)
Enter some text in the box below to try it for yourself - accepts a-z, 0-9 and the symbols . and @ only