Diagnostics
Self-tests for this device. They use made-up sample text, not your documents.
OCR (reading text from images)
Reads a sample image in English and Spanish using the built-in OCR engine. The first run takes a few seconds.
PDF flattening
Makes a sample PDF, blacks out a name, rebuilds it as pictures only, then checks no text survived.
Network check
Lists every request this page has made to any other website. It should always be zero.