JSON to TOON Converter

Convert between JSON and TOON (Token-Oriented Object Notation) formats

Free online JSON ↔ TOON converter and validator. TOON reduces token usage by 30-60% for AI/LLM applications.

JSON TOON

Input (JSON)

0 characters

Output (TOON)

0 characters

History

Examples

JSON to TOON Conversion

Input JSON: 
{
  "users": [
    {"id": 1, "name": "Alice", "role": "admin"},
    {"id": 2, "name": "Bob", "role": "user"}
  ]
}
Output TOON: 
users[2]{id,name,role}:
  1,Alice,admin
  2,Bob,user

Token Savings: This TOON format uses approximately 50% fewer tokens than the JSON equivalent, making it ideal for AI/LLM applications.

Frequently Asked Questions

What is TOON format?

TOON (Token-Oriented Object Notation) is a compact, human-readable serialization format designed to reduce token usage by 30-60% compared to JSON when working with Large Language Models (LLMs) and AI applications. It uses tabular arrays and indentation-based structure for maximum efficiency.

How do I convert JSON to TOON?

Simply paste your JSON in the input field, select "JSON → TOON", and click Convert. The tool will instantly convert your JSON to the more token-efficient TOON format. You can also validate your JSON before converting.

Can I validate JSON and TOON formats?

Yes! Click the "Validate" button to check if your input is valid JSON or TOON format without converting it. This is useful for debugging and ensuring your data is correctly formatted.

Why use TOON instead of JSON for AI?

TOON reduces token usage by 30-60% compared to JSON, which saves costs and allows you to send more data to LLMs within token limits. It's especially useful for API responses, structured data, and tabular data where you need to maximize information density.

Is this tool free to use?

Yes, TOON Converter is completely free to use. No registration required, no API keys needed, and no usage limits. You can use it as much as you need for both personal and commercial projects.

Can I use this tool via API?

Yes! The tool has a RESTful API that you can use programmatically. Visit /api/docs for documentation, or check /api/ai-tools for AI-friendly tool descriptions.