csv-to-xlsx

Convert CSV / TSV files to Excel .xlsx from the command line.

Quick Start

npm install -g csv-to-xlsx

csv-to-xlsx data.csv                     # → data.xlsx
csv-to-xlsx data.csv -o output.xlsx      # custom output path
csv-to-xlsx data.csv -d ";"              # semicolon delimiter
csv-to-xlsx data.csv -s "MySheet"        # custom sheet name
csv-to-xlsx data.tsv                     # auto-detects tab delimiter

Features

• CSV & TSV — auto-detects .csv vs .tsv, sets delimiter accordingly
• Custom delimiter — -d ";" for semicolons, -d "|" for pipes
• Sheet naming — -s "Data" sets the worksheet name
• Auto-sized columns — column widths adjust to content
• Full CJK — Chinese, Japanese, Korean preserved
• Single dependency — just SheetJS for parsing and writing

CLI Reference

Usage: csv-to-xlsx [options] <input>

Arguments:
  input                   Path to the .csv or .tsv file

Options:
  -o, --output <path>     Output .xlsx path (default: <input>.xlsx)
  -d, --delimiter <char>  Column delimiter (default "," for .csv, tab for .tsv)
  -s, --sheet <name>      Sheet name (default: "Sheet1")
  --no-numbers            Disable auto-detection of numeric columns
  -V, --version           Show version
  -h, --help              Show help

Development

git clone <repo>
cd csv-to-xlsx
npm install

npm run dev -- data.csv     # run without building
npm run build               # compile TypeScript
npm test                    # run unit + integration tests

License

MIT