JSON Formatter Online

What is JSON Formatting?

JSON (JavaScript Object Notation) formatting transforms compact, hard-to-read JSON data into a well-structured, indented format. Our free online JSON formatter helps developers quickly pretty-print JSON responses from APIs, configuration files, and databases.

Why Use a JSON Formatter?

Raw JSON from APIs and databases is often minified into a single line, making it nearly impossible to read. A JSON formatter adds proper indentation and line breaks so you can quickly understand the structure, find specific values, and debug issues.

How to Format JSON Online

Simply paste your JSON into the input box and click "Format". Choose your preferred indentation (2 spaces, 4 spaces, or tab). The formatted output appears instantly on the right. Copy it to your clipboard or download as a .json file.

JSON Pretty Print Example

{
  "name": "John",
  "age": 30,
  "address": {
    "city": "NYC",
    "zip": "10001"
  }
}

Common Use Cases for JSON Formatting

• Format API responses – Pretty print JSON from REST APIs, GraphQL, or webhooks to quickly understand the data structure and debug issues
• Clean config files – Reformat package.json, tsconfig.json, or any configuration file with consistent indentation
• Minify for production – Compress JSON to a single line to reduce payload size in API responses and storage
• Prepare for documentation – Format JSON examples for README files, API docs, or Postman collections
• Debug data pipelines – Inspect JSON flowing through ETL pipelines, message queues, or log files

Features

• Pretty print with customizable indentation (2, 4, or 8 spaces)
• Minify JSON to a single line for compact storage
• Instant error detection with descriptive messages
• Copy formatted output to clipboard with one click
• Download as .json file for local use
• 100% client-side – your data never leaves your browser
• Works with any valid JSON: objects, arrays, nested structures
• Dark and light theme support