sparkly-cli

sparkly‑cli is a command‑line utility that converts sequences of numbers into compact Unicode sparklines, allowing quick visual inspection of data trends directly in a terminal. It accepts numbers as arguments or from standard input, and outputs a line of characters such as ▁▂▃▅▂▇ that represent the relative magnitude of each value.

The tool offers optional flags to control the rendering: --min and --max set explicit range boundaries, while --style selects a predefined visual theme (e.g., “fire”). These options let users tailor the sparkline to specific datasets or aesthetic preferences without additional processing steps.

Designed for developers and data‑oriented users who need lightweight, on‑the‑fly visual summaries, sparkly‑cli can be installed globally via npm and used in scripts, pipelines, or interactive sessions. It builds on the sparkly API library, providing a straightforward CLI wrapper around the same functionality.