JSON Formatter & Validator - Free Developer Tool | NexUtils

Free json formatter & validator for developers. Essential development utilities at your fingertips. Fast, easy to use, and 100% free.

JSON Formatter & Validator

Input JSON

Output

About JSON Formatter

Working with raw JSON data can be messy. The JSON Formatter & Validator is an essential tool for developers and data analysts. Whether checking an API response, cleaning configuration files, or decoding minified data, this tool creates a readable hierarchical tree. It runs 100% in your browser for privacy.

How to Use This Tool

Paste JSON

Copy your raw JSON string and paste it into the left editor.

Select Action

Click 'Beautify' to indent and format nicely, or 'Minify' to remove whitespace/compress.

Validate

If the JSON is invalid, an error message will appear explaining exactly what's wrong.

Key Features

•Local Processing (Zero Server Uploads)
•Dual Mode: Beautify & Minify
•Error Detection with Line Numbers
•Example Data Loaded Automatically

Frequently Asked Questions

Is my JSON sent to a server?

No. This tool runs entirely in your browser using JavaScript. Your sensitive data remains private.

Can it fix bad JSON?

It validates and points out errors, but it (intentionally) avoids 'auto-fixing' to prevent data corruption. You must correct the syntax yourself.

Advanced Features

Toggle advanced mode to see more detailed inputs and configuration options for precise calculations.

Export & Share

Download your calculation results as PDF or CSV, or share them directly with others.

How it Works

Our calculators use industry-standard formulas to ensure 100% accuracy for all your needs.