JSON to TOON Converter

TOON is a token-efficient representation of the JSON data model. It keeps the same objects, arrays, and primitives while minimizing tokens and improving LLM parsing.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based, and language-independent data-interchange format designed to be human-readable and easy for machines to parse. It is widely used for transmitting data between servers and web applications.

Structure: curly braces for objects and square brackets for arrays.
Syntax: comma-separated name/value pairs with keys in double quotes.
Data types: strings, numbers, booleans, null, objects, and arrays.
Use cases: APIs, configuration files, and web services.
Independence: supported across most modern programming languages.

Why convert JSON to TOON?

Lower token usage for LLM inputs and prompts.
Readable indentation with compact tabular arrays.
Lossless conversion back to JSON.

How it works

Paste JSON into the left editor.
Click the TOON button.
Copy or edit the TOON output on the right.

Try the JSON → TOON Playground

Open the LangToon Playground and switch to the JSON tab to convert instantly.