Privacy · Local on this Mac
A key stays covered.
When you open your clipboard history on a call or at a desk next to someone, yesterday’s token shouldn’t be the first thing on the screen.
Copybook is built for a simple rule: the book lives in a local file on this Mac, and anything that looks like a secret stays covered until you ask to see it.
What Copybook covers automatically
- API keys and developer tokens: Strings matching key prefixes and high-entropy secrets land sealed as •••• •••• ••••.
- Card numbers and sensitive strings: Masked before the sticker appears on today’s page.
- 100% local storage: Stored in ~/Library/Application Support/app.copybook.desktop with no account, no cloud sync, and no analytics.