How JSON to TOON Converter Works

Learn how TOON format reduces LLM token usage

What is TOON Format?

TOON (Token-Oriented Object Notation) is a data format designed to reduce token consumption in LLM applications. Unlike JSON, which uses extensive syntax (braces, brackets, quotes), TOON uses:

  • Indentation for structure (similar to YAML)
  • Tabular format for uniform arrays
  • Minimal syntax - removes redundant characters
  • Human-readable - easy to review and debug

Conversion Process

1

Input JSON Data

Paste or type your JSON data into the converter. The tool automatically validates the JSON syntax.

2

Automatic Conversion

The converter processes your JSON locally in the browser, removing redundant syntax and optimizing the structure.

3

Token Analysis

See exact token reduction statistics - original tokens vs TOON tokens, percentage saved, and cost implications.

4

Copy & Use

Copy the optimized TOON format and use it directly in your LLM prompts. Works with GPT-4, Claude, Gemini, and more.

Why TOON Works Better

TOON format achieves up to 60% token reduction by:

  • Removing unnecessary braces, brackets, and quotes
  • Using indentation instead of nested syntax
  • Converting uniform arrays to compact tabular format
  • Eliminating redundant whitespace and separators

This optimization directly translates to lower API costs and faster LLM responses, while maintaining full data structure clarity.