Free Developer Tool
JSON to TOON Converter
Reduce your LLM API costs by 30-60% with token-optimized data serialization
Instant Conversion
Real-time results
Save Money
Cut API costs
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Client-side only
JSON Input0 characters
TOON Output
TOON output will appear here...
Try a Template
Click on any template below to see TOON in action with real-world examples
What is TOON?
TOON (Token-Oriented Object Notation) is a compact, human-readable data format designed specifically to reduce token consumption when working with Large Language Models (LLMs). By eliminating redundant syntax found in JSON—like excessive braces, brackets, and quotes—TOON achieves a 30-60% reduction in token count.
Why This Matters for Your Business
Lower API Costs: If you're spending $10,000/month on OpenAI, Claude, or Gemini, TOON could save you $3,000-6,000/month
Faster Responses: Fewer tokens mean faster processing and lower latency
Better Context Windows: Fit more data within LLM context limits
Example Comparison
JSON
{
"products": [
{
"id": 301,
"name": "Mouse",
"price": 29.99
}
]
}~85 tokens
TOON
products[1]{id,name,price}:
301,Mouse,29.99~32 tokens (62% savings!) 🎉
Best Use Cases
- E-commerce catalogs - Product listings with consistent structures
- User directories - Large lists of users with similar fields
- API responses - Repetitive data structures from APIs
- Business data - Structured company information for AI systems
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