Protect your OpenCart store from spam, fake registrations, and automated bot attacks with this highly configurable captcha module. Unlike typical captchas that disrupt the user experience, Improved Captcha is designed to work silently in the background — no extra clicks, no frustration for your customers.

The module generates secure and fully customizable captcha images, allowing you to adjust everything from character type to image distortion level. You can fine-tune the difficulty and appearance to match your site’s design and your security requirements.

Key Features:

Eight captcha formats: numbers, Latin/Cyrillic letters, math challenges, word lists, case sensitivity
Ten advanced distortion techniques to prevent automated recognition
Adjustable captcha parameters: image size, font size, character count
Supports TTF fonts and outputs images in PNG or JPEG format
Noise levels and distortion lines for stronger security
Random character rotation, offsets, and size variations
Optional shadows, borders, antialiasing for visual style and added protection
Session lifetime control and retry limits
Automatic IP blocking for bots after failed attempts
Logging of module actions for security monitoring
Clean admin panel divided into: General, Appearance, Security, and Advanced tabs

This module provides the right balance between usability and protection, making it ideal for stores that want to stop bots without losing real customers.