JSON Formatter & Validator

What is the JSON Formatter?

This tool allows you to format, validate, and minify JSON data directly in your browser. It also generates TypeScript interfaces from your JSON structures automatically.

How to Use

1. Paste your JSON string into the left "Input" text area.
2. The formatted JSON will appear in the "Output" area.
3. Use the dropdown to change indentation (2 spaces, 4 spaces, Tab, or Minify).
4. Click the "TS Types" tab to view the automatically inferred TypeScript definitions for your data.

Terminology

• JSON (JavaScript Object Notation): A lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate.
• Minify: Removing unnecessary whitespace and indentation to reduce file size.

Common Use Cases

• Validating API responses to ensure the JSON is well-formed.
• Minifying JSON payloads before embedding them in scripts or sending them over a network.
• Quickly generating TypeScript types from a JSON response to use in a frontend project.

Security

This tool uses standard web browser APIs. No data is sent to a server. Everything is processed locally on your machine, ensuring your sensitive data remains private.