spark

spark is a lightweight, open-source shell utility that transforms numerical data into compact visual graphs using Unicode block characters. It generates sparklines directly inside terminal windows without requiring graphical interfaces or external visualization software. Users provide sequences of numbers separated by spaces, commas, or other common delimiters. The software automatically scales values and represents their relative magnitudes using different block heights. It can process data produced by command-line tools, scripts, and Unix pipelines. Common applications include displaying Git commit activity, monitoring numerical trends, and visualizing system measurements. Spark can also be embedded into shell prompts or automated reports to provide quick visual summaries. Its minimal shell-script implementation makes installation and integration straightforward.