JSON Formatter

Paste your JSON below to format, validate, and beautify it instantly. Free, fast, and works entirely in your browser.

JSON Formatter & Validator

Format, validate, and minify your JSON data with auto-fix

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JSON Validator JSON Minifier JSON Beautifier

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What is a JSON Formatter?

A JSON formatter takes raw or minified JSON data and restructures it with proper indentation and line breaks, making it easy to read and debug.

Before — Raw JSON

{"name":"John","age":30,"city":"New York","skills":["JavaScript","React"],"active":true}

After — Formatted JSON

{
  "name": "John",
  "age": 30,
  "city": "New York",
  "skills": [
    "JavaScript",
    "React"
  ],
  "active": true
}

Why Use This JSON Formatter?

Instant Formatting

Paste your JSON and it formats immediately. No button to click, no waiting.

Error Detection

Invalid JSON is highlighted with the exact line and error message.

100% Private

Everything runs in your browser. Your data never leaves your device.

Syntax Highlighting

Color-coded keys, values, and types for faster reading and debugging.

Minify Option

Switch between formatted and minified output with one click.

Auto-Fix

Smart suggestions to fix common errors like trailing commas and unquoted keys.

Frequently Asked Questions

How do I use the JSON formatter?

Simply paste your JSON into the editor above. The formatter will automatically detect and format your JSON with proper indentation and syntax highlighting.

Is this JSON formatter free?

Yes, completely free. No account, no limits, no hidden fees. Use it as much as you need.

What is the difference between a JSON formatter and a JSON beautifier?

They are the same thing. A JSON formatter (also called a JSON beautifier or JSON pretty printer) adds indentation and line breaks to make JSON readable. Our tool does both.

Can I format large JSON files?

Yes. The formatter runs entirely in your browser with no file size limit. Performance depends on your device, but most files up to several MB work smoothly.

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