jsonlint

jsonlint Plugin

A JSON parser and validator with a CLI. Validate JSON files, sort keys, and format JSON.

Commands

JSON Validation

• jsonlint validate file — Validate JSON file

Utility

• jsonlint _ _ — Passthrough to jsonlint CLI

Usage Examples

• "Validate this JSON file"
• "Check JSON syntax"
• "Format this JSON"
• "Sort JSON object keys"

Installation

npm install -g jsonlint

Examples

# Validate file
jsonlint validate file data.json

# Validate from stdin
echo '{"name": "test"}' | jsonlint

# Sort object keys
jsonlint validate file data.json -s

# Format in place
jsonlint validate file data.json -i

# Sort and format in place
jsonlint validate file data.json -s -i

# Validate from pipe
cat data.json | jsonlint

# Any jsonlint command with passthrough
jsonlint _ _ data.json
jsonlint _ _ -s -i data.json

Key Features

• Validation - Check JSON syntax
• Error reporting - Clear error messages
• Sort keys - Alphabetically sort object keys
• In-place editing - Modify files directly
• Stdin support - Process from pipe
• Pure JavaScript - No native dependencies
• Cross-platform - Works everywhere
• Fast - Efficient parsing

Notes

• Reports line and column of errors
• Use -s to sort object keys
• Use -i to edit files in place
• Can be used in CI/CD pipelines
• Great for pre-commit hooks
• Validates JSON RFC 8259 compliance