Docs
Using Can I Format
It never writes to, deletes from or formats a card. It reads the card and reports. Even when it imports files, it only copies them off the card. Erasing the card is always something you do yourself, after a clean check.
Quickstart Guide
Download it, add a library and check a card.
Libraries
Folders, Lightroom catalogs and cloud drives: what to add and how each is read.
Rules
Decide what counts as safe, with separate rules for video and audio.
Checking a card
Checking cards and folders, reading the report, previews and history.
Importing missing files
Copy what's missing into your libraries, filed the way you already file them.
Safety and privacy
What it never does to your cards, and why your data never leaves your computer.
Under the hood
How files are matched, why it stays fast, and where your data is kept.
Run from source
Run it with Node on Windows, macOS or Linux, and inspect a catalog.