JSON to TOON Converter
Free online JSON to TOON converter. TOON (Token-Oriented Object Notation) is a compact data format that saves 30-60% LLM tokens vs JSON. No upload required - ideal for AI developers.
Understanding TOON Data Format
What is TOON Data Format?
TOON (Token-Oriented Object Notation) is a compact data serialization format designed specifically for Large Language Models (LLMs). It uses indentation for nesting, array length declarations, and header-row field definitions to reduce token overhead by 30-60% compared to JSON while maintaining human readability.
TOON vs JSON: Key Differences
TOON vs JSON comparison: TOON replaces curly braces with indentation, declares array sizes using [N] syntax (e.g., users[3]), and defines field names once in a header row {field1,field2}. Strings only require quotes when containing special characters. This makes TOON significantly more token-efficient than JSON.
Use Cases & Benefits
Our JSON to TOON converter is ideal for: embedding structured data in LLM prompts, cost-sensitive API applications, and workflows requiring human review of AI inputs/outputs. The TOON data format preserves JSON semantics while dramatically reducing token consumption.
JSON to TOON Example
{"users":[{"id":1,"name":"Alice"},{"id":2,"name":"Bob"}]} users[2]
{id,name}:
1,Alice
2,Bob