Sanitizer

Sanitizer is a Windows desktop tool that prepares documents for use with AI assistants by stripping out sensitive information before anything reaches a language model. It processes files entirely on the local machine, so no documents are uploaded to the cloud and no account is required. The tool replaces names, contacts, client identities, credentials, and keys with opaque tokens, while keeping the original values in a private vault so the redaction can be reversed locally if needed. Beyond redaction, Sanitizer converts heavy file formats like PDFs and Word documents into lightweight Markdown and CSV, shrinking file size while preserving content. It then builds dual full-text and semantic indexes so an AI agent can retrieve just the relevant passages of a document instead of processing the whole file, with citations back to the source. The tool is aimed at both individuals who want to use AI on private documents and business teams that need to share project files with an AI system without exposing sensitive data. A free Personal edition covers individual use, while a $49.99/month Business edition is distributed through the Microsoft Store. One limitation: it is currently Windows-only, with no web version, API, or support for other operating systems.