Is my JSON data uploaded or saved?

No. All formatting, parsing, and minification runs strictly inside your local browser memory via native JavaScript. No network requests are sent.

Can it handle large JSON files?

Yes! The tool can easily format large payloads up to dozens of megabytes smoothly in browser memory.

What does Sort Keys do?

Sort Keys alphabetically arranges all JSON object properties recursively, making diffing and version comparisons effortless.

JSON Formatter

Prettify, validate, and minify your JSON data.

Free No Signup 100% Private No Watermark

Indentation:

Input JSON

Valid

Formatted Output

Formatted JSON will display hereClick Prettify, Minify, or Sort Keys

More Dev Tools

How to Use JSON Formatter in 3 Easy Steps

Fast, local, and completely free with no software installation required.

Select or Drop Your File

Choose or drag-and-drop your file into the secure workspace directly from your device.

Customize Settings & Process

Adjust desired quality, options, or target formatting in real-time with instant browser processing.

Download Your Finished File

Save your optimized, watermark-free result immediately with zero server uploads or tracking.

About JSON Formatter

A professional-grade JSON utility for developers. Paste raw, minified, or unformatted JSON and instantly turn it into clean, indented, syntax-validated code. You can also sort keys alphabetically, minify for production payloads, and download the formatted file. Everything happens client-side in your browser.

All file conversions, resizing, and processing take place directly in your browser using modern WebAssembly and HTML5 Canvas technologies. No data is stored, tracked, or sent across external networks.