JSON ↔ TOON Converter
Convert between JSON and TOON formats with real-time token analysis
JSON Input
TOON Output
Token Analysis
⚠ This data structure may not benefit from TOON format. Consider using JSON for deeply nested or non-uniform data.
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About JSON to TOON Conversion
Our free JSON to TOON converter helps you optimize data for Large Language Models like GPT-4, Claude, and other AI systems. By converting JSON to TOON format, you can reduce token consumption by 30-60%, significantly lowering your LLM API costs while improving processing speed and accuracy.
The converter includes real-time token counting using the GPT-5 tokenizer (o200k_base), so you can see exactly how many tokens you're saving with each conversion. Whether you're working with employee records, user data, API responses, or time-series analytics, TOON format provides optimal compression for tabular and uniform data structures.
Key Features
- Bidirectional Conversion: Convert JSON to TOON and TOON to JSON with one click
- Real-time Token Analysis: See token counts and savings percentage instantly
- Format Validation: Automatic syntax validation and error detection
- Customizable Options: Choose delimiter (comma, tab, pipe), indentation, and key folding
- Example Datasets: Six pre-loaded examples covering common use cases
- Download Support: Export your converted files as .json or .toon formats
Best Use Cases for TOON Format
TOON format excels when working with structured, tabular data. The format is particularly effective for:
- Arrays of uniform objects (employee records, user lists, product catalogs)
- Time-series data and analytics results
- API responses with consistent structure
- Database query results and CSV-like data
- Configuration files with repeated patterns
- Machine learning datasets and training data