JSON to TOON Converter
Convert JSON to TOON (Token Oriented Object Notation) and reduce LLM token usage by 30–50%. Free, instant, browser-based.
How to Use JSON to TOON Converter
How to Use JSON to TOON Converter
Paste your JSON into the input field. The tool instantly converts it to TOON format and shows the estimated token count before and after — so you can see exactly how many tokens you save when using TOON instead of JSON in your LLM prompts.
What is TOON?
TOON (Token Oriented Object Notation) is a compact, human-readable encoding of the JSON data model designed specifically for LLM input. It removes structural noise — quotes, commas, braces — and uses indentation and tabular patterns instead. The result is a lossless representation of your data that uses significantly fewer tokens.
Key TOON Syntax Rules
- Objects →
key: valueper line, indented nesting - Primitive arrays →
key[N]: v1,v2,v3 - Uniform arrays of objects → tabular:
key[N]{field1,field2}:followed by data rows - Strings → unquoted by default; quoted only when they contain special characters or could be ambiguous
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