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JSON Formatter & Validator

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JSON Formatter & Validator

Format, validate, beautify, and minify JSON data. Perfect for developers with real-time syntax validation and error detection.

100% Private Instant Formatting Error Detection JSON Statistics

Paste your JSON to validate and format

Input JSON

Formatted Output

0 Lines

0 Bytes

0 Keys

— Type

All processing happens locally. Your JSON data never leaves your browser.

How to Use

Paste JSON

Copy and paste JSON into input

Choose Action

Format, Minify, or Validate

View Results

See formatted JSON and stats

Copy Output

Copy to clipboard for use

Features

Beautify JSON

Proper indentation & formatting

Minify

Remove whitespace

Validate

Error detection & messages

Statistics

Lines, size, keys, type

JSON Syntax

Objects {}

Key-value pairs in curly braces

Arrays []

Ordered lists in square brackets

Strings

Must use double quotes

Numbers

Integers or floats, no leading zeros

Why Use Our JSON Formatter?

Instant Formatting

Beautify JSON in milliseconds

100% Private

All local processing

Error Detection

Detailed validation messages

JSON Stats

Lines, size, keys & type

Frequently Asked Questions

What's the difference between JSON and JavaScript object?

JSON is a string format requiring double-quoted keys. JavaScript objects allow unquoted keys, single quotes, and functions.

Why is my JSON invalid?

Common issues: trailing commas, unquoted keys, single quotes instead of double, or missing commas between items.

What's minified JSON used for?

Minified JSON removes whitespace to reduce file size, making it faster to transmit over networks.

Can JSON contain comments?

No, JSON doesn't support comments by specification. Use external documentation or preprocessing if needed.

What's the maximum JSON size?

There's no theoretical limit, but practical limits depend on browser memory. Large JSONs may affect performance.

Is my data private?

Yes! All processing happens locally in your browser. Your JSON data never leaves your device.

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