JSON to TOON Converter
Instantly convert JSON to TOON format, reducing LLM token usage by 30-60%. Free, secure browser-based converter that lowers GPT-4 and Claude API costs — no registration, no data collection.
JSON Input
TOON Output
Why Use JSON to TOON Converter?
Save on LLM API costs, protect your privacy, and optimize your AI workflow with the most efficient data format for ChatGPT, Claude, and other language models.
Reduce Tokens by 30-60%
TOON format eliminates redundant syntax in JSON like brackets, braces, and repeated keys — reducing token usage by up to 60% according to official benchmarks.
Lower LLM API Costs
Significantly save on GPT-4, Claude, Gemini, and other LLM API costs. With an average 46% token reduction, you save immediately on every API call.
100% Client-Side Processing
All conversions happen locally in your browser. Zero data transfer, zero servers, zero tracking. Your JSON data is absolutely private and secure.
Frequently Asked Questions
What is TOON format?
TOON (Token-Oriented Object Notation) is a compact data format designed specifically for large language models. It eliminates repeated keys and excessive punctuation in JSON, reducing token usage by 30-60%.
Is my data secure?
All conversions happen entirely in your browser using JavaScript. No data is sent to any server, and we don't store or track anything. Your data never leaves your device.
Can LLMs understand TOON format?
Yes! Modern LLMs like GPT-4, Claude, and Gemini can easily understand TOON format when provided with brief instructions in your prompt. The token savings far outweigh the small context cost of explaining the format.