JSON to Toon
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Json to Toon

Simple converter with token savings and download.

Paste or upload JSON on the left; see compressed toon on the right.

Indentation
2/4 spaces or none
Key Folding
Safe keeps rows tight
Delimiter
Separator in folded rows
Allow Duplicates
Preserve duplicate keys when parsing
JSON Input
JSON: 58 tokens
59% reduction
Toon Output
users[2]{id,name,role}:
1 1,Alice,admin
2 2,Bob,user
settings:
theme: dark
notifications: true
TOON: 24 tokens
Token Reduction
59%
Tokens Saved
34
Final Tokens
24

What is a JSON to TOON Converter?

A JSON to TOON converter transforms standard JSON into TOON (Token-Oriented Object Notation) to strip redundant braces, brackets, and quotes—cutting token usage for LLMs by 30-60%.

What makes TOON different
TOON keeps structure via indentation and compact array headers, similar to YAML but tuned for token efficiency.
Why use it
Fewer tokens means lower LLM costs. At $30 per million tokens, TOON can save thousands across workloads.
Who benefits
AI devs, chatbot builders, RAG/agent teams, and any workflow that feeds JSON to LLMs.
Why choose this converter
Free, browser-first, privacy-safe, with live token stats and programmatic API for CI/CD or pipelines.
Instant conversion
All processing happens in your browser—no upload latency. Typical savings: 46%+, up to 60% on real data.
How to use
Step 1: Paste JSON. Step 2: Click Convert to TOON. Step 3: Review token savings. Step 4: Copy or download and drop into prompts or pipelines.
API & workflow integrations
Call POST /api/convert from tools like n8n, Zapier, or custom middleware to shrink tokens on-the-fly. Pass JSON and options (indentation, delimiter, folding) and use the toon output directly in your LLM calls.
Features
Real-time token counting, syntax validation, one-click copy, large-file support, lossless structure, batch ready via API, and open-source core.
FAQ highlights
TOON is lossless and LLM-friendly; works with OpenAI, Claude, Gemini, Cohere, OSS models; keeps data local; supports up to 10MB files in-browser; bigger loads can use the API/library.
Quick API example (swap your token if using x-api-key):
curl -X POST https://jsontotoon.in/api/convert \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_TOKEN_HERE" \
  -d '{"json":{"users":[{"id":1,"name":"Alice"}]},"indentation":"none","keyFolding":"safe","delimiter":","}'