HIBP Email Checker is a WordPress plugin that allows your visitors to check if their email address has appeared in any known data breaches using the Have I Been Pwned API. It features a fully responsive frontend form (via shortcode), styled results with detailed breach information (including logos, dates, and data types), and uses transients to reduce API usage by caching results for 24 hours. Easy to install and no coding required.

• Check email addresses using Have I Been Pwned API
• Frontend email checker form via shortcode [hibp_check_form]
• Responsive design with clear visual feedback
• Displays breach name, logo, date, description, and compromised data
• Transient caching (24h) to reduce API usage
• AJAX-based – no page reload
• Easy to install and use
• Full source code included

• WordPress 5.0 or higher
• PHP 7.4 or higher
• Valid Have I Been Pwned API key (free or paid)
• jQuery (included by WordPress)

Instructions

1. Install and activate the plugin through the WordPress admin panel
2. Get a Have I Been Pwned API key from https://haveibeenpwned.com/API...
3. Open hibp-email-checker.php and replace TU_API_KEY with your actual key
4. Place the [hibp_check_form] shortcode into any post or page
5. Done! Visitors can now check their emails safely