go-json-prettier

A lightweight CLI tool to format and prettify JSON files.

Features

• Pretty-print JSON with proper indentation
• Process multiple files at once
• Write formatted output back to files in-place with the -w flag
• Error handling for malformed JSON

Installation

go build -o json-prettier

Usage

Print formatted JSON to stdout:

./json-prettier file.json

Format multiple files:

./json-prettier file1.json file2.json file3.json

Write formatted JSON back to file (in-place):

./json-prettier -w file.json

Examples

# View prettified JSON
./json-prettier data.json

# Format multiple files and save them
./json-prettier -w config1.json config2.json

How it Works

1. Reads the JSON file
2. Parses the JSON content
3. Re-formats with 2-space indentation
4. Either prints to stdout or writes back to the file (with -w flag)

Error Handling

• Reports file not found errors
• Displays JSON parsing errors with context
• Handles file write permission issues