JSON Formatter & Validator

Format, validate and minify JSON data with syntax highlighting.

Input JSON

Output

Indent

Sort keys

About JSON Formatter

Format, validate, and minify JSON data instantly. Supports pretty-printing with configurable indentation, JSON validation with clear error messages, key sorting, and one-click minification. All processing happens in your browser — your data never leaves your device.

'Is my JSON data safe?', 'a' => 'Absolutely. All processing happens in your browser using JavaScript. Your JSON is never sent to any server or stored anywhere.'], ['q' => 'What is JSON minification?', 'a' => 'Minification removes all unnecessary whitespace, indentation, and line breaks from your JSON, reducing the file size. This is useful for production APIs and data storage.'], ['q' => 'Can I sort JSON keys alphabetically?', 'a' => 'Yes! Enable the \"Sort keys\" checkbox and then click Format. All object keys will be sorted alphabetically at every nesting level.'], ]" />

Before You Use This Tool

A quick overview of what this page is good for, how it handles data, and what to expect before you start.

What It Does

Format, validate and minify JSON data with syntax highlighting

Access & Privacy

You can use the main workflow without creating an account.

The core workflow is designed for fast in-browser use. Review the page inputs before pasting sensitive information.

Good Fit For

Debug payloads, strings, and markup quickly during daily development.
Generate copy-ready output without installing another package.
Test ideas in the browser before moving into a bigger workflow.

For repeated bulk jobs or advanced automation, dedicated desktop software may still be faster.

Used 173 times

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