Nightfall for ChatGPT is a Chrome extension developed to protect sensitive data when using ChatGPT. Utilizing artificial intelligence, the extension scans for potentially sensitive information, such as personally identifiable information (PII) and payment card information (PCI). It is designed to intercept and remove this data in real-time, thus ensuring compliance with data protection regulations and minimizing security risks. The tool provides visibility over data interactions and prevents leaks, making online communications secure and seamless.