# JSON to TOON > JSON to TOON converter that reduces LLM token usage by 30-60%. Free, browser-local, no signup. Works with GPT-4, Claude, Gemini, and all major LLMs. ## Tool - [JSON to TOON Converter](https://jsontoon.in/) — paste JSON, get TOON-formatted output with live token-savings count. ## Documentation - [Full AI-extractable corpus](https://jsontoon.in/llms-full.txt) — FAQ, how-to, and feature reference as plaintext. - [Site map](https://jsontoon.in/sitemap.xml) — all indexable URLs. ## Specification - [TOON format specification (external)](https://github.com/byjohann/toon) — the open-source format this tool produces and consumes.