Online JSON Formatter & Validator

Beautify, minify, escape & explore JSON
100% client-side
Output
Paste JSON and click Format JSON

JSON Knowledge Base

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is widely used in modern APIs, microservices, configuration files, and data exchange between frontend and backend systems.

Why JSON is so popular?

  • Language-independent and platform-neutral
  • Easy to read compared to XML
  • Natively supported by JavaScript and most backend languages
  • Ideal for REST APIs and web applications

Common JSON Operations

Professionals frequently work with JSON to:

  • Format / Beautify JSON for readability
  • Minify JSON to reduce payload size
  • Escape JSON for storing inside strings or logs
  • Validate JSON before sending to APIs
  • Explore deeply nested objects and arrays

Frequently Asked Questions (FAQs)

Is this JSON formatter free to use?

Yes. This tool is completely free and runs entirely in your browser. No sign-up or installation is required.

Is my JSON data sent to any server?

No. All formatting, validation, and transformations happen locally in your browser. Your data never leaves your device.

What does “Escape JSON” mean?

Escaping JSON converts it into a string-safe format, commonly used when storing JSON inside logs, environment variables, or other JSON strings.

What should I do if my JSON is invalid?

The tool highlights the exact error location and displays the parsing error message, helping you quickly identify and fix the issue.

Can I use this tool for production or enterprise work?

Yes. This tool is suitable for developers, testers, analysts, and architects. However, always validate critical data flows within your application as well.