AISustainability·

TOON A Modern Alternative to JSON for Efficient Data Serialization

Explore TOON, a lightweight and efficient data serialization format designed to reduce token usage in AI and lower the carbon footprint of IT systems. Learn how TOON compares to JSON, its benefits for AI applications, and its positive impact on sustainability.

In the world of data serialization, JSON (JavaScript Object Notation) has long been the standard. However, a newer format called TOON (Token-Oriented Object Notation) is gaining attention for its efficiency and simplicity. TOON is designed to be more compact than JSON, reducing the amount of data transmitted and stored.

How TOON Differs from JSON

TOON achieves its compactness by eliminating unnecessary syntax. For example, TOON removes quotes around keys, uses commas only when necessary, and avoids redundant braces. Here’s a comparison:

JSON Example

JSON
{
  "user": {
    "name": "Sébastien Serre",
    "role": "IT Consultant",
    "skills": ["DevOps", "Cloud Architecture", "AI"]
  }
}
43 tokens, 132 characters

TOON Example

TOON
user:
  name: Sébastien Serre
  role: IT Consultant
  skills[3]: DevOps,Cloud Architecture,AI
29 tokens, 93 characters

In this example, TOON reduces the file size by 32%. While this may seem modest for small files, imagine the impact on large-scale JSON payloads such as those used in APIs, databases, or configuration files. For instance, a 10 MB JSON file could be reduced by 2-3 MB with TOON, leading to significant savings in storage, bandwidth, and processing time.

For more details about TOON, you can explore its official website or visit TOON’s GitHub page.

TOON for AI Reducing Token Usage and Cost Efficiency

Large Language Models (LLMs) are among the most data-intensive technologies in use today, often processing massive payloads of text and structured data. Since most LLMs charge users based on token consumption, the efficiency of data formats directly impacts operational costs and performance.

TOON’s compactness reduces the number of tokens required to represent the same information, which is particularly valuable in AI applications. By minimizing token usage, TOON helps lower costs and speeds up processing, making it an attractive option for developers working with LLMs. The ability to handle more requests with fewer resources also enhances scalability, allowing AI systems to operate more efficiently even as demand grows.

For those interested in performance metrics, the official TOON documentation provides a variety of benchmarks, demonstrating its advantages in real-world AI scenarios.

TOON and Sustainability Reducing the Carbon Footprint of IT

Beyond performance and cost benefits, TOON contributes to sustainability by reducing the environmental impact of data processing. Smaller data formats require less storage and bandwidth, which translates to lower energy consumption and fewer carbon emissions. As AI models continue to expand in size and complexity, adopting efficient data formats like TOON can help mitigate their environmental footprint, supporting the broader goal of sustainable technology.

The Future of TOON A Format to Watch

TOON is still an emerging technology, but its potential to streamline data serialization, especially in AI and large-scale systems, makes it an exciting development. As the format evolves and gains adoption, it could become a standard for applications where efficiency and sustainability are priorities. I’ll be keeping a close eye on TOON’s progress and will share more insights as it develops, so stay tuned for future updates on this promising format.

© 2026 — Made with ❤️ around the world.