TOON (Tokenized Object Notation) is a compact data format designed to minimize file size compared to JSON. It uses type markers like 'n' for null, 'b1'/'b0' for booleans, '#' for numbers, and 's :' for strings, achieving 30-50% compression.

Is ConvertTOON safe to use?

Yes, ConvertTOON is completely safe. All conversions happen locally in your browser. Your data is never sent to any server, ensuring complete privacy and security.

How much can I compress with TOON?

TOON typically achieves 30-50% compression compared to JSON. The exact amount depends on your data structure and content. Use ConvertTOON to see the exact compression for your specific data.

ConvertTOON - Free JSON to TOON Format Conversion Tool

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JSON

Tokens: 0

TOON

Tokens: 0

About ConvertTOON - JSON to TOON Format Converter

ConvertTOON is the premier free online tool for converting between JSON and TOON formats. TOON (Tokenized Object Notation) is a revolutionary compact data format designed to minimize file size while maintaining data integrity and readability. Unlike traditional JSON, TOON uses intelligent type markers and string encoding to dramatically reduce storage requirements and network bandwidth. This makes it ideal for applications where data compression and token efficiency are critical.

At converttoon.com, we provide a fast, free, and secure JSON to TOON converter that processes all your data locally in your browser. Whether you're optimizing API payloads, reducing token consumption in LLM APIs, or simply exploring the TOON format, ConvertTOON is your go-to solution.

Key Features of ConvertTOON

JSON to TOON Conversion: Automatically convert your JSON data to TOON format with a single click, achieving compression rates typically between 30-50%
TOON to JSON Conversion: Seamlessly reverse the process and restore your original JSON structure from TOON format with perfect fidelity
TOON Format Validation: Validate TOON syntax instantly to ensure data integrity before using in production environments
Real-time Token Counting: See exactly how many tokens your data will consume, helping optimize API usage and reduce costs with services like OpenAI, Anthropic, and others
Compression Analytics: Visual comparison of token counts showing exactly how much space and cost you save with TOON format conversion
No Installation Required: ConvertTOON works directly in your web browser - no downloads, plugins, or setup needed
100% Private & Secure: All conversions happen locally in your browser. Your data is never sent to any server

Popular Use Cases for ConvertTOON

API Optimization: Reduce API payload sizes and improve response times by using TOON format for data transmission between services
Database Storage: Store more data in less space by converting JSON documents to TOON before database insertion
LLM Token Optimization: Minimize token consumption in language model APIs (ChatGPT, Claude, GPT-4) by pre-converting prompts and data to TOON format, significantly reducing costs
Mobile Applications: Reduce bandwidth consumption and improve performance on mobile networks with compact TOON encoding
Real-time Analytics: Process streaming data more efficiently by using TOON format to reduce memory footprint and processing overhead
IoT & Edge Computing: Transmit sensor data efficiently with minimal bandwidth requirements using TOON compression
Data Archiving: Compress historical data for long-term storage while maintaining structure and searchability

💡 Pro Tip - Save on LLM API Costs:

If you use OpenAI, Claude, or other LLM APIs, converting your prompts and data to TOON format before sending can reduce token usage by 30-50%. Use ConvertTOON to estimate your potential savings before implementation.

Ready to Optimize Your Data Format with ConvertTOON?

Start converting your JSON to TOON today using ConvertTOON.com. Select your conversion mode, paste your data, and instantly see the token and compression improvements. No installation required - works directly in your browser.

All conversions happen locally in your browser using converttoon.com. Your data is never sent to any server - complete privacy and security guaranteed.

What is TOON Format?

TOON (Tokenized Object Notation) represents a fundamental rethinking of JSON optimization. Instead of the verbose structure of JSON with repeated quotes and separators, TOON uses efficient type markers:

n - null value
b1/b0 - boolean (true/false)
# - numbers (e.g., #42, #3.14)
s<length>:<string> - strings with length prefix
[...] - arrays with comma-separated values
{...} - objects with key-value pairs using = and ; separators

This approach can reduce data size by 30-50% compared to JSON, making it perfect for token-sensitive applications and bandwidth-constrained environments.