JSON Validator, Beautifier & Syntax Debugger

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Programmatic Code Snippets: Format & Pretty-Print JSON

How to implement Format & Pretty-Print JSON programmatically in Python, Node.js, PHP, and CLI

CLI & API Syntax

Format and indent JSON in Python

import json

raw_json = '{"name":"Toolbox24","active":true,"features":["beautifier","validator"]}'
parsed = json.loads(raw_json)
pretty_json = json.dumps(parsed, indent=2)
print(pretty_json)

Pretty-print JSON with 2 spaces in JavaScript / Node.js

const rawJson = '{"name":"Toolbox24","active":true,"features":["beautifier","validator"]}';
const parsed = JSON.parse(rawJson);
const prettyJson = JSON.stringify(parsed, null, 2);
console.log(prettyJson);

Format JSON with JSON_PRETTY_PRINT in PHP

<?php
$raw_json = '{"name":"Toolbox24","active":true,"features":["beautifier","validator"]}';
$parsed = json_decode($raw_json, true);
echo json_encode($parsed, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);

Pretty-print JSON using jq or python on the CLI

# Using jq (recommended):
echo '{"name":"Toolbox24","active":true}' | jq .

# Using Python built-in json.tool:
echo '{"name":"Toolbox24","active":true}' | python3 -m json.tool

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