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Free browser-based developer tool

JSON Formatter Online

Format, beautify, minify, validate, sort, and inspect JSON instantly. Built for developers, API testers, students, technical writers, and anyone working with structured JSON data.

Format JSON Now How It Works

JSON Formatter & Validator

Paste JSON below, choose an action, and get clean output instantly.

Input JSON 0 characters
Active mode: Format JSON Waiting for JSON
Output 0 characters
— Status
0 Keys
0 Objects
0 Arrays
0 Max Depth
0 Characters

JSON Preview

Readable preview of your parsed JSON structure.

Paste valid JSON to preview structure.

Best Use Cases

Common workflows for developers and API users.

Format API responses Turn compact API output into readable JSON with indentation.
Validate JSON syntax Check whether copied JSON payloads, configs, or API data are valid.
Minify JSON data Remove whitespace before storing, sharing, or sending JSON.

Free Online JSON Formatter, Validator, and Beautifier

This JSON Formatter helps you format JSON online, validate JSON syntax, minify JSON, sort object keys, inspect JSON structure, and copy or download clean JSON output directly from your browser.

It is useful for developers, API testers, backend engineers, frontend developers, students, technical writers, and anyone working with JSON data, API responses, configuration files, or structured web data.

What is JSON?

JSON stands for JavaScript Object Notation. It is a lightweight data format commonly used for APIs, configuration files, web applications, databases, logs, and data exchange between systems.

What can this JSON Formatter do?

  • Format JSON: Beautify compact JSON into readable structure.
  • Validate JSON: Check whether your JSON syntax is valid.
  • Minify JSON: Remove unnecessary whitespace from JSON data.
  • Sort JSON keys: Alphabetize object keys for cleaner organization.
  • Inspect JSON: View key count, object count, array count, depth, and size.
  • Export JSON: Copy or download formatted JSON output.

Why use an online JSON Formatter?

Raw JSON from APIs is often compact and difficult to read. A JSON formatter makes the data easier to scan, debug, compare, and document. A validator also helps detect broken syntax before JSON is used in code, configuration files, requests, or production workflows.

Common JSON validation errors

  • Missing commas between properties or array items.
  • Trailing commas after the last item.
  • Using single quotes instead of double quotes.
  • Unquoted object keys.
  • Broken brackets, braces, or nested structure.

Privacy and browser-based processing

This JSON Formatter runs locally in your browser. Your JSON is not uploaded to a server, which makes it suitable for quick formatting and debugging of non-sensitive development data.

Frequently Asked Questions

Is this JSON Formatter free?

Yes. This JSON Formatter and Validator is completely free to use online.

Does this tool upload my JSON?

No. JSON is processed directly in your browser and is not uploaded to a server.

Can I validate invalid JSON?

Yes. If your JSON has syntax errors, the tool shows an error message.

Can I minify JSON?

Yes. Choose Minify JSON to remove unnecessary whitespace and create compact output.

Can I sort JSON keys?

Yes. Choose Sort Keys to alphabetize object keys recursively.