What is Miller?

Miller (mlr) is a command-line tool for processing name-indexed data such as CSV, TSV, JSON, and JSON Lines. It's designed for data wrangling and analysis, allowing users to filter, reshape, and aggregate data using a simple, declarative syntax. Miller excels at tasks like data extraction, transformation, and loading (ETL), data exploration, and report generation, often serving as a more versatile alternative to traditional tools like awk, sed, cut, and jq.