JSON to TOON Converter
Convert JSON to TOON online to cut LLM prompt tokens by 30–60%. Free, browser-based, with a live token-savings counter.
Switch between JSON to TOON or TOON to JSON conversion
Tab delimiter often saves more tokens
JSON TOKENS
0
TOON TOKENS
0
SAVED
0%
TOON (Token-Oriented Object Notation) is a compact, human-readable format designed for LLM prompts. It achieves 30-60% token savings compared to JSON while maintaining structure and readability.
- Token Efficient: Removes redundant punctuation and declares array structures once
- LLM-Friendly: Explicit lengths and fields enable better validation
- Tabular Arrays: Perfect for uniform data structures like user lists or analytics
- Indentation-Based: YAML-like structure with minimal syntax
About JSON to TOON Converter
TOON (Token-Oriented Object Notation) is a compact, human-readable encoding of JSON designed for LLM prompts. This converter turns JSON into TOON in your browser and shows the estimated token savings live — typically 30–60% versus the same data as JSON.
TOON declares array structures once and strips redundant punctuation while keeping the data fully recoverable. That makes it ideal for stuffing structured context — user lists, analytics rows, tool schemas — into a prompt without burning your token budget.
How to use JSON to TOON Converter
Paste your JSON
Paste JSON into the input editor (an example is preloaded).
Get TOON
The TOON output and token-savings stats update automatically.
Tune options
Adjust delimiter, indentation, and length markers to squeeze out more tokens.
Copy or download
Copy the TOON to your clipboard or download it as a file.
Frequently asked questions
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