formatarc

formatarc

Convert JSON, YAML, and CSV from the terminal. No config, no dependencies to manage — just pipe or pass your data.

Web version → formatarc.com

Install

npm install -g formatarc

Or run directly with npx:

npx formatarc json-format '{"a":1}'

Usage

formatarc <tool> [input or file]
cat file | formatarc <tool>

Tools

Command	Description
json-format	Pretty-print JSON
yaml-to-json	Convert YAML to JSON
json-to-yaml	Convert JSON to YAML
csv-to-json	Convert CSV (with header row) to JSON

Examples

Format JSON:

formatarc json-format '{"name":"FormatArc","tools":["json","yaml","csv"]}'

{
  "name": "FormatArc",
  "tools": [
    "json",
    "yaml",
    "csv"
  ]
}

Convert a YAML file to JSON:

formatarc yaml-to-json config.yaml

Pipe from curl:

curl -s https://api.example.com/data | formatarc json-format

Convert CSV from stdin:

cat users.csv | formatarc csv-to-json

Programmatic API

import { convert } from "formatarc";

const result = convert("json-format", '{"a":1}');
console.log(result.output);
// {
//   "a": 1
// }

convert(tool, input)

Returns { output: string, error: string }.

• output — the converted result (empty string on error)
• error — error message (empty string on success)

Web Version

For a browser-based experience with no signup and no data upload:

formatarc.com

• JSON Formatter, YAML ↔ JSON, CSV → JSON
• Runs entirely in the browser
• Multilingual (English / Japanese)

License

MIT