Nosey Parker is a newly developed open-source command-line tool designed to identify sensitive information within text files and Git history, functioning similarly to a specialized version of grep. It effectively detects confidential data such as passwords and API keys, utilizing 188 proven detection rules to minimize false positives. The tool’s flexible scanning capabilities allow it to cover files, folders, and GitHub repositories, making it beneficial for both offensive and defensive cybersecurity teams. By enhancing the efficiency of security assessments, Nosey Parker, available for free on GitHub, represents a significant advancement in the ongoing efforts to bolster cybersecurity measures, reflecting a growing awareness of the need for robust defenses against data breaches.