Napkin is a lightweight scratchpad application for Linux and Windows that lets users quickly paste and store text and images without requiring organization, naming, or filing. It bridges the gap between a temporary clipboard and a formal notes app, designed for developers and users who need a persistent but low-friction place to capture snippets, links, screenshots, and half-formed ideas. The tool prioritizes simplicity, local storage, and privacy with no accounts, sync, telemetry, or network access.