OpenCaptcha is a CAPTCHA generation software that is actively used by others, generating over 100,000 CAPTCHA images per month.

Interestingly, this software is based on code from over 20 years ago—originally published in 2004.

(https://www.codeproject.com/Articles/5947/CAPTCHA-Image)

Below are examples of CAPTCHA images generated by this software. It is quite hard to read, but the text is `Example`.

Also, I wanted people to use my software, so I made it free and created a user-friendly website (www.opencaptcha.io) that explains how to use the software and provides examples.