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JSON Formatter & Beautifier

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Beautify, validate, and debug your JSON data instantly. 100% Client-side processing for maximum security.

JSON Formatter
Input JSON
Formatted Output
Valid JSON

What is a JSON Formatter?

A **JSON Formatter** is a developer tool that automatically re-organizes raw, minified, or disorganized **JSON** (JavaScript Object Notation) code into a structured, human-readable format. It applies proper indentation (beautification), adds nesting levels, and highlights syntax errors, making it easier to debug APIs and configuration files.

How to Format JSON Online

  1. 1

    Paste your Data

    Copy your raw JSON string and paste it into the main editor window. The tool supports standard JSON, JSON5, and even loosely formatted objects.

  2. 2

    Validate & Fix

    The editor instantly checks for syntax errors. If found, click the Auto Fix button to repair common issues like missing quotes or trailing commas.

  3. 3

    Copy or Download

    Once formatted, use the Copy button to save it to your clipboard, or Download to save the file locally as a `.json` document.

Why use JSONBuddy?

Built for professional developers who handle sensitive data.

Zero-Knowledge Privacy

Your code never leaves your device. We use a strictly client-side architecture, so you can safely format sensitive API keys or production data.

Smart Validation

More than just formatting. Detects duplicate keys, specific syntax errors, and provides intelligent suggestions to fix your JSON structure.

Advanced Tools

Minify for production, convert to CSV/XML, generating TypeScript interfaces, or visualize your data structure—all in one place.

Frequently Asked Questions

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