Quick Tip: TOON (Token-Oriented Object Notation) reduces LLM token usage by up to 60%, saving costs and fitting more context.

JSON Input

Editor Empty

Paste JSON or drop a file to begin

TOON Result

What's Next?

TOON to JSON

Convert TOON back to JSON

JSON Minifier

Alternative size reduction

JSON to YAML

Indentation-based alternative

Documentation

Learn about TOON tokens

API Performance

Optimization tips

JSON Indenter

Format input JSON

JSON to TOON: High-Density AI Data

Convert JSON to TOON (Text-Oriented Object Notation) for massive density in AI interactions. TOON is designed to strip away the syntactic noise of JSON while maintaining its semantic power.

Ultra Compressed: Minimal boilerplate for maximum data density.
LLM Native: Designed for optimal token usage in modern model contexts.
Human-ish: Maintains enough structure for developer readability.

The Future of Prompting

As model context windows grow, the need for efficient data representation becomes critical. TOON represents a step forward in how we communicate structured data to AI, focusing on content over container.

JSON to TOON Conversion Guide

Why Convert JSON to TOON?

TOON (Text-Oriented Object Notation) is a data format specialized for ultra-dense representation of structured objects. By removing the syntactic overhead of JSON, it allows for significantly higher information density, which is ideal for large-scale AI context windows and real-time game state synchronization.

Use cases for TOON:

AI Performance: Maximize context window efficiency for LLMs.
Game Dev: Lightweight state synchronization for multiplayer engines.
Edge Computing: Lower payload sizes for constrained network devices.
High-Speed RPC: Faster serialization/deserialization for microservices.

TOON Notation Basics

Record Definitions

Person {
  name: "Arthur"
  age: 28
}

Type Tags

#meta: "v1.0"
State { open: true }

Best Practices

Case Sensitivity

Always use consistent casing (camelCase or PascalCase) for record names.

Type Flattening

Flatten deeply nested JSON where possible to leverage TOON's record speed.

Metadata Tags

Use # tags for versioning and schema identification at the root level.

JSON to TOON Examples

Game Character Sheet

JSON Character

{
  "name": "Eldrin",
  "stats": {
    "hp": 100,
    "mp": 50
  },
  "spells": ["fire", "frost"]
}

TOON Character

Character {
  name: "Eldrin"
  stats: Stats { hp: 100, mp: 50 }
  spells: [ "fire", "frost" ]
}

Inventory Layout Metadata

Inventory JSON

{
  "grid": "4x4",
  "items": [
    { "id": 1, "type": "weapon" },
    { "id": 2, "type": "herb" }
  ]
}

Inventory TOON

Inventory {
  grid: "4x4"
  items: [
    Item(1) { type: "weapon" },
    Item(2) { type: "herb" }
  ]
}

Frequently Asked Questions

Is my data safe with this JSON tool?

Yes. This tool uses 100% client-side processing. Your JSON data never leaves your browser and is never sent to our servers, ensuring maximum privacy and security.

What is TOON format?

TOON stands for Token-Optimized Object Notation. It's a highly compressed, semantic-preserving representation of JSON designed to reduce token usage by up to 60% when sending data to LLMs like GPT or Claude.

How does TOON save tokens?

TOON saves tokens by removing redundant brackets, quotes, and structural delimiters that standard JSON requires, replacing them with a minimal, newline-delimited syntax that LLMs can still parse perfectly.

Do LLMs understand TOON?

Yes, advanced LLMs like GPT-4, Claude 3, and Gemini are trained to understand semantic structures even without rigid JSON syntax. Using TOON allows you to fit significantly more context into a single prompt.