OSINT: Online Safety in the Age of Oversharing explores how publicly available information can be collected, connected, and exploited in the digital age. The talk introduces what OSINT is, the spectrum of data available—from public records to social media crumbs—and how even small details can be pieced together to reveal sensitive insights. Attendees will see live demonstrations of powerful tools like Maltego, SpiderFoot, and FindMyPast, showing how hackers and investigators alike leverage open data. The session balances technical and non-technical perspectives, highlighting both the risks of oversharing and practical steps individuals and organizations can take to protect themselves.