JSON Formatter & Validator | Free Online Tool

Format and validate your JSON data professionally

Instantly format, validate, and detect errors in your JSON code. A fast and reliable online JSON formatter tool designed for developers.

Formatted JSON

Format & Beautify
Make your JSON data readable with proper indentation and formatting.
Validate & Check
Instantly identify JSON syntax errors and validation issues.
Minify & Optimize
Compress JSON data by removing whitespace for smaller file size.
How to Use?
Step by Step Usage
  1. Paste your JSON code into the left text box or start with the sample button
  2. Adjust settings like tab width and key sorting according to your needs
  3. Click 'Prettify' to format your code or 'Minify' to compress it
  4. Use tree view to display JSON in a hierarchical structure
  5. Copy the result or download it as a JSON file to your computer
Key Features
  • Instant JSON validation and error detection
  • Code and tree view options
  • Customizable indentation settings
  • Key sorting and minify features
  • Copy and download options
Why This JSON Formatter?
UseWebTools JSON Formatter is designed to solve the challenges developers face when working with JSON data. With its fast, reliable, and user-friendly interface, you can easily manage your JSON data.
Advantages
  • Completely free and ad-free usage
  • Your data is safe - no data is stored on our servers
  • Mobile-friendly design and dark mode support
Use Cases
  • Analyzing API responses and debugging
  • Editing configuration files
  • Visualizing and sharing JSON data
About JSON
JSON (JavaScript Object Notation) is a data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It has become the standard for API communication in modern web applications.
JSON Structure
  • Objects: Unordered set of key/value pairs in {"key": value} format
  • Arrays: Ordered collection of values in [value1, value2, ...] format
  • Values: Can be string, number, object, array, boolean (true/false), or null
Common Use Cases
  • Data exchange between web APIs
  • Configuration files and settings
  • Data storage in NoSQL databases
  • AJAX requests and modern web applications