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JSON Formatter & Validator

Format, validate, and beautify JSON instantly with syntax highlighting and error detection.

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How it works

1.

Paste JSON

Copy your JSON string into the input box above.

2.

Format or Minify

Click "Format JSON" to beautify with indentation, or "Minify JSON" to compress for production.

3.

Copy Result

Copy the formatted JSON to your clipboard with one click.

Common use cases

→

API Development & Testing

Format API responses from REST or GraphQL endpoints for easier debugging and inspection.

→

Configuration Files

Beautify package.json, tsconfig.json, settings.json, and other config files for better readability.

→

Data Analysis

Make large JSON datasets human-readable to identify patterns and structure.

→

Code Review & Git

Format JSON before committing to ensure consistent formatting across your team.

Frequently asked questions

Is my JSON data stored or sent to a server?

No. All JSON formatting and validation happens entirely in your browser using JavaScript. Your data never leaves your computer, ensuring complete privacy and security.

What is JSON and why format it?

JSON (JavaScript Object Notation) is a lightweight data format used for APIs, config files, and data storage. Formatting makes it human-readable by adding proper indentation and line breaks.

Can I format large JSON files?

Yes, this tool can handle JSON files up to several megabytes. Very large files (>10MB) may slow down your browser depending on your device capabilities.

What does the validator check for?

The validator checks for proper JSON syntax including correct brackets, quotes, commas, and data types. It will show specific error messages if your JSON is invalid.

Can I use this tool offline?

Yes, once the page loads, the tool works completely offline since all processing happens in your browser.

What is the difference between Format and Minify?

Format adds indentation and line breaks for readability. Minify removes all whitespace to reduce file size, ideal for production environments.

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></iframe>

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Start getting better AI results today
Analyze PromptTest Across 6 Models