JSON Editor & Validator

What is JSON Editor & Validator?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate. A JSON editor provides a user-friendly interface for working with JSON data, including validation, formatting, and editing capabilities that help developers work more efficiently with JSON structures.

Common Use Cases

• API development and testing - validate and format API request/response payloads
• Configuration file editing - modify JSON config files for applications
• Data transformation - edit JSON before converting to other formats
• Debugging - format minified JSON to identify issues
• Code generation - prepare JSON data for code scaffolding tools
• Documentation - format JSON examples for technical documentation

How It Works

The JSON editor provides a Monaco-based code editor with JSON-specific features. It validates JSON syntax in real-time, highlighting errors with line and column numbers. You can format JSON with customizable indentation, minify it by removing whitespace, search and replace text within the JSON, and compare two JSON documents side-by-side. The editor also supports undo/redo functionality and can save your work locally in the browser.

Examples

{"name":"John","age":30,"city":"New York"}

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

{name:"John",age:30}

Error: Expected property name or '}' in JSON at position 1