🔄 JSON to TOON Converter
Convert JSON to Token-Oriented Object Notation and reduce your LLM API costs
💰 Save 30-60% on LLM Tokens
📝 JSON Input
⚡ TOON Output
💰 LLM Cost Calculator
$0.00
GPT-4 Turbo Savings/Request
$0.00
Claude 3.5 Savings/Request
$0.00
Gemini 1.5 Savings/Request
$0
Est. Yearly Savings (100 req/day)
* Estimates based on 100 requests/day. Actual savings depend on your data structure.
Tool Features
- Bidirectional: Convert JSON to TOON and TOON back to JSON.
- Token Counter: Real-time token count comparison.
- Cost Estimator: See estimated savings for GPT-4, Claude, and Gemini.
- 100% Private: All processing happens in your browser.
When to Use TOON
TOON is ideal for sending structured data to LLMs as context.
- User lists, product catalogs: Uniform arrays of objects see the biggest savings.
- RAG context: Summarize retrieved documents more efficiently.
- Agent state: Pass complex state objects with fewer tokens.
Related Developer Tools
❓ Frequently Asked Questions
What is TOON
(Token-Oriented Object Notation)?+
TOON is a compact data format designed for LLMs. It uses 30-60% fewer tokens than JSON
by eliminating braces, brackets, and excessive quotes.
How does TOON reduce token
usage?+
TOON uses indentation instead of braces, converts uniform arrays to CSV-like tables, and
removes unnecessary quotes.
Is TOON conversion
lossless?+
Yes! TOON preserves all data types. JSON → TOON → JSON round trips are fully lossless.
When should I use TOON vs
JSON?+
Use TOON for LLM context. Use JSON for APIs and configuration files.
Is my data
secure?+
All conversion is 100% client-side. Your data never leaves your browser.