Input Type:
Client-Side Processing
All processing happens in your browser - your data never leaves your device for maximum privacy and security.
Flexible Input
Accepts both raw JSON and CSV data, adapting to your specific data structuring needs.
LLM Optimization
Drastically cut down on your token costs for language models by up to 40% or more.
Optimize Your LLM Interactions with TOON Encoding
Slash your API costs and improve performance by converting verbose JSON or CSV into the compact TOON format. Our free online encoder is the perfect tool for developers working with generative AI, large language models, and data-intensive applications. Reduce token consumption and streamline your data for faster, more efficient processing.
For AI and Machine Learning Developers
When fine-tuning models or sending prompts to services like OpenAI's GPT or Google's Gemini, every token counts. TOON format minimizes the data size of your training sets and prompts, resulting in significant cost savings and reduced latency. Use our tool to effortlessly convert JSON datasets or CSV logs into token-efficient TOON before feeding them into your model pipelines. Keywords: JSON to TOON converter, LLM token optimization, AI data compression.
For API and Backend Engineers
In modern system design, efficient data transfer is key. TOON's lightweight syntax makes it an excellent choice for API payloads, especially in microservices architectures or for IoT devices with limited bandwidth. Convert your standard JSON API responses to TOON to reduce network traffic and improve response times for your end-users. Keywords: CSV to TOON online, efficient data serialization, API payload optimization.
Frequently Asked Questions
What is TOON format and why should I use it? expand_more
TOON (Token-Oriented Object Notation) is a data format designed for maximum efficiency. Its minimalist, parenthesis-based syntax significantly reduces the character count compared to JSON's brackets and quotes, leading to a smaller token footprint. You should use it to save money on LLM API calls, reduce data transfer sizes, and speed up parsing in performance-critical applications.
How does this online encoder work? expand_more
Simply select your input type (JSON or CSV), paste your data into the left-hand panel, and click the "Convert" button. The tool will instantly parse your input and display the equivalent TOON representation in the right-hand panel. You can then copy the result to your clipboard.
Is my data secure? expand_more
Yes. All conversions happen entirely within your browser. Your data is never sent to our servers, ensuring complete privacy and security. You can safely use this tool for sensitive information.
Can I convert CSV files with different delimiters? expand_more
Currently, our online tool supports standard comma-separated values (CSV). For more complex CSV formats with different delimiters or quoting rules, we recommend pre-processing your data before pasting it into the encoder.
What is TOON format and how does it work? expand_more
TOON (Token-Oriented Object Notation) is a compact data serialization format specifically designed to minimize token usage in Large Language Models. Unlike JSON's verbose bracket-and-quote syntax, TOON uses indentation-based structure and tabular arrays where field names are declared once, then data is listed as rows. This dramatically reduces the character count and token consumption, making it ideal for AI applications where every token impacts cost and performance.
How can TOON format reduce AI costs? expand_more
TOON reduces AI costs by cutting token usage by 30-60% compared to JSON. Since most LLM APIs (OpenAI, Anthropic, Google) charge per token, using TOON format for your data can significantly lower your API bills. For example, if you're sending 10,000 tokens of JSON data per day, switching to TOON could reduce this to 4,000-7,000 tokens, potentially saving hundreds of dollars monthly on large-scale applications.
What is the TOON syntax structure? expand_more
TOON syntax uses a simple, human-readable structure: arrays are declared with brackets containing field names like users[3]{name,age,email}, followed by data rows separated by newlines. Objects use indentation instead of braces, and values don't require quotes unless they contain special characters. The syntax is designed to be both compact for machines and readable for humans, making it easy to debug and maintain.
How do I convert JSON to TOON format? expand_more
Converting JSON to TOON is simple with our free online tool: (1) Select 'JSON' as your input type, (2) Paste your JSON data into the left panel, (3) Click 'Convert' or press Ctrl/Cmd+Enter, (4) The TOON output appears instantly in the right panel. You can then copy the result and use it in your LLM prompts, API calls, or data pipelines. The conversion is completely client-side, so your data stays private.
Can I use TOON with ChatGPT, Claude, or other LLMs? expand_more
Yes! TOON works excellently with all major LLMs including ChatGPT (OpenAI), Claude (Anthropic), Gemini (Google), and others. Simply convert your data to TOON format and include it in your prompts. LLMs can easily parse and generate TOON format due to its logical structure. For best results, include a brief explanation of TOON syntax in your system prompt the first time you use it, then the model will handle it naturally in subsequent interactions.
What are the main benefits of Token-Oriented Object Notation? expand_more
Token-Oriented Object Notation offers several key benefits: (1) 30-60% reduction in token usage compared to JSON, (2) Lower API costs for LLM applications, (3) Faster processing and reduced latency, (4) Human-readable syntax that's easy to debug, (5) Efficient handling of tabular data common in AI applications, (6) Client-side processing for maximum privacy, and (7) Compatible with all major programming languages and LLM platforms. These advantages make TOON ideal for production AI systems where efficiency and cost matter.