TOON (Token-Oriented Object Notation) is a data serialization format designed specifically for LLM prompts to be highly efficient. It dramatically reduces token usage by 30-60% compared to JSON while remaining structured and human-readable. By using a tabular format for arrays and minimal syntax for objects, TOON makes your data cheaper and faster to process with AI models.

What's the difference between TOON and JSON?

The key difference is token efficiency. JSON is verbose, with brackets, quotes, and commas that consume tokens. TOON is a more compact syntax designed for LLMs, representing arrays as tables with headers and using minimal punctuation. This efficiency directly translates to significant cost savings on your LLM API bills, especially for large or repeated datasets.

How much can I save with TOON?

You can typically expect to save 30-60% on LLM tokens compared to using JSON. For large datasets or frequent API calls, this translates directly into significant cost savings. Data with repeated structures, like API responses or database results, often sees savings at the higher end of this range (40-60%).

Is TOON compatible with all LLMs?

Yes. TOON is a simple text format that works flawlessly with all major large language models, including those from OpenAI (GPT-4), Anthropic (Claude), Google (Gemini), and Meta (LLaMA). Since any LLM can process plain text, they can all be instructed to understand and parse the TOON format with a simple instruction in your prompt.

Can I convert TOON back to JSON?

Absolutely. TOON is fully and losslessly reversible. Our converter tool supports bidirectional conversion, meaning you can convert TOON back to the exact original JSON structure without any data loss. This allows you to use TOON for efficiency and then convert back to JSON for compatibility with other tools.

What types of data work best with TOON?

TOON can represent any valid JSON data, but it delivers the highest token savings (40-60%) on uniform tabular data. This includes database query results, API responses with lists of objects, analytics data, or product catalogs. While TOON fully supports nested objects and arrays, the token reduction is most dramatic with flatter, more repetitive data structures.

Is my data safe when using this converter?

100% safe. All conversion from JSON to TOON (and back) happens locally in your browser. Your data is never sent to any server, never stored, and never seen by us. The converter even works offline once the page has loaded, guaranteeing your information remains private.

Yes, completely free. Both this TOON converter and the underlying TOON format specification are open and free to use without any limits, file size restrictions, or premium features. It's an open-source effort to make working with LLMs more efficient for everyone.

política de Privacidade

Última atualização: 12/27/2025

Operações do lado do cliente

JSON to TOON Converter é um aplicativo do lado do cliente. Isso significa que toda a lógica de conversão de dados é executada diretamente no seu computador, dentro do seu navegador. Não temos um servidor que processe seus dados.

Sem coleta de dados

Não coletamos, salvamos ou transmitimos nenhum dos dados inseridos no conversor. Os dados que você cola no JSON to TOON Converter nunca saem da sua máquina. Não há logs, bancos de dados e registros de sua atividade.

Sem cookies para rastreamento

Não utilizamos cookies ou qualquer outra tecnologia de rastreamento para monitorar seu comportamento. Os únicos dados que armazenamos no armazenamento local do seu navegador são a sua preferência pelo tema claro ou escuro, para sua conveniência. Esta informação não nos é enviada.

Mudanças de política

Embora a maioria das alterações provavelmente seja pequena, o JSON to TOON Converter pode alterar sua Política de Privacidade de tempos em tempos e a nosso exclusivo critério. Encorajamos os visitantes a verificar frequentemente esta página para quaisquer alterações à sua Política de Privacidade.