json-fmt-cli

A zero-dependency CLI to format, minify, validate, and query JSON from the terminal.

Install

npm install -g json-fmt-cli

Or use directly with npx:

npx json-fmt-cli data.json

Usage

# Pretty-print with 4-space indent
cat data.json | json-fmt-cli --indent 4

# Minify
json-fmt-cli file.json --minify

# Validate
json-fmt-cli file.json --validate

# Query a value
json-fmt-cli file.json --query "users[0].name"

# Pipe from stdin
curl -s https://api.example.com/data | json-fmt-cli --indent 2

Options

| Option | Description | |---|---| | --indent <n> | Pretty-print with n spaces (default: 2) | | --minify | Minify JSON output | | --validate | Check if JSON is valid | | --query <path> | Extract a value by path (e.g. users[0].name) | | -h, --help | Show help | | -v, --version | Show version |

License

MIT © 2026 kszongic