JSON Token-Minimized Language
Schema-first serialization for LLM prompts. Eliminate key repetition, reduce tokens by up to 60%, and cut API costs — without changing your JSON structure.
@schema default id:i name:s role:s active:b score:f @data @array 1|Alice|engineer|1|98.5 2|Bob|designer|0|87.2 3|Carol|manager|1|92
LLM Analysis
Run the same model on both formats simultaneously — your data is interpreted identically, with fewer tokens.
Your API key is never stored on our servers — used only for this request and saved locally in your browser per provider.
Token Analysis
Input Tokens
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Output Tokens
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Token Savings
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Compression
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Cost Calculator
Estimate savings based on your traffic and model pricing.
Cost Breakdown — 1,000 req/day on GPT-4o
Encode some JSON above to see cost projections
Zero dependencies
Pure TypeScript. Works in any Node.js 20+ project.
Schema-first encoding
Auto-inferred types. Keys sent once, not per row.
Perfect round-trip
Decode back to the original JSON exactly.