What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data format used to store and exchange information between systems. It uses a simple structure with key-value pairs and arrays, making it easy for both humans to read and machines to parse. JSON has become the standard format for web APIs, configuration files, and data storage because of its simplicity and universal support across programming languages.

Tool description

This JSON validator checks whether your JSON code is properly formatted and follows valid syntax rules. It instantly identifies errors in structure, missing brackets, incorrect commas, or invalid values, helping you quickly fix formatting issues before using the data in your applications.

Features

  • Real-time syntax validation with detailed error messages
  • JSON syntax highlighting for better readability
  • Pinpoints exact location of syntax errors
  • Supports all valid JSON data types (objects, arrays, strings, numbers, booleans, null)
  • Instant feedback as you type

Use cases

  • Debugging API responses to ensure proper formatting
  • Validating configuration files before deployment
  • Checking JSON data before importing into databases
  • Verifying JSON structure in development and testing
  • Teaching and learning proper JSON syntax