What this file tool does
Checks file-system metadata, filename patterns, common image metadata markers, and readable text samples for email addresses, phone-like numbers, GPS labels, and author fields.
The scanner reads at most the first 2 MiB of each file, searches conservatively for recognizable privacy indicators, and creates a JSON report.
Your selected files stay in this browser session. Binary formats can hide metadata in structures this browser-only scanner does not fully parse. A clean report is not proof that all private data is absent.