JSON Formatter & Validator

Free Online JSON Formatter & Validator

CodingBubble's JSON Formatter is a free, fast, and secure tool for formatting, validating, and fixing JSON data. Whether you're working with API responses, configuration files, or database exports, our tool helps you instantly beautify messy JSON into readable, properly indented code.

We collect only metadata (tool usage, data sizes, timing) - your actual data is never logged or stored. See our Privacy Policy for details on how we handle data.

Features

Format JSON with customizable indentation (2 spaces, 4 spaces, or tabs)
Validate JSON with detailed error messages and line numbers
Fix common JSON errors automatically
Sort keys, remove duplicates, and minify
Convert JSON to YAML, CSV, or XML
JSONPath query, Schema validation, and JSON diff
Load JSON from URL and download output
Collapsible sections and interactive tree view

Example

Before (unformatted):

{"name":"John Doe","age":30,"email":"john@example.com","active":true}

After (formatted):

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "active": true
}

Frequently Asked Questions

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It's commonly used in web APIs, configuration files, and data storage.

Why should I format JSON?

Formatted JSON is easier to read and debug. Proper indentation helps you understand the structure of nested objects and arrays.

How is my data handled?

We collect only metadata (tool usage, data sizes, timing) - your actual data is never logged or stored.

What errors can "Fix JSON" repair?

Our Fix JSON feature can repair trailing commas, single quotes, unquoted keys, missing brackets, and other common syntax issues.