How It Works
Convert JSON to TOON format in four simple steps
Paste or type your JSON data into the editor on the left side. The editor provides syntax highlighting and validation to help you identify any errors.
Our converter automatically transforms your JSON into TOON format in real-time. The conversion happens instantly as you type, so you can see the results immediately.
See exactly how many tokens you save with TOON format. The statistics panel shows original token count, TOON token count, tokens saved, and percentage reduction.
Copy the TOON output to your clipboard with one click, or download it as a .toon file for later use. The format is ready to use in your LLM applications.
TOON (Token-Oriented Object Notation) is a compact data serialization format designed specifically to minimize token usage in language model applications. Unlike JSON, which uses verbose syntax with quotes, colons, and commas, TOON uses a more efficient encoding scheme.
The format maintains full semantic compatibility with JSON while reducing the character count and token usage. This makes it ideal for applications that interact with LLMs, where token costs can add up quickly with large datasets.
Our converter uses the official @toon-format/toon library to ensure accurate and reliable conversions. The token count is calculated using tiktoken, which provides precise token counting for GPT models.