What is JSON Formatter?

It is a free online tool designed to help you with beautify, validate, minify, and inspect json structures. You can use it directly in your browser without any installation.

Is JSON Formatter completely free to use?

Yes, JSON Formatter is 100% free to use. There are no hidden fees, no subscriptions, and no signup required.

Does it work on mobile devices?

Absolutely! Our tool is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.

⚡ Tree View, Models & Diff Compare 100% Client-Side Privacy

JSON Formatter & Validator

Beautify, validate, minify, repair, compare, and convert JSON online. Generate TypeScript, Python, YAML, XML, and CSV models instantly in your browser.

Input JSON Data

Valid JSON

Formatted Output View (CODE)

Want to learn more about JSON formatting & validation? Read our developer guide on JSON repair and model generation.

Read Developer Guide

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How to use JSON Formatter & Validator

1

Paste your minified, messy, or unformatted JSON data into the editor.

2

Click the 'Format' (Beautify) button to instantly add proper indentation, line breaks, and spacing.

3

If you want to compress the data, click 'Minify' to remove all unnecessary whitespace.

4

If your JSON has syntax errors, the tool will highlight the exact line and character causing the issue.

Why use our JSON Formatter & Validator?

Strict Validation Engine

Detects missing quotes, trailing commas, and improper bracket closures instantly, pointing you to the exact line number of the error.

Tree View & Folding

Easily navigate massive JSON payloads by collapsing and expanding nested objects and arrays.

100% Client-Side Parsing

Your API payloads, API keys, and private data are formatted directly in your browser. We never log or store your JSON data.

100% Secure & Private

All processing happens in your browser. Your files are never uploaded to our servers, guaranteeing absolute privacy and security.

Lightning Fast

Because everything runs locally on your device, processing is instant. No waiting in queues or dealing with slow uploads.

Frequently Asked Questions

Why is my JSON showing a parsing error?

The most common JSON errors are: using single quotes instead of double quotes around keys, leaving a trailing comma after the last item in an array/object, or forgetting to escape special characters.

What does it mean to Minify JSON?

Minification removes all spaces, tabs, and line breaks from the JSON file. This makes the file size significantly smaller, which is ideal for transmitting data quickly over a network API.