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Charly Wargnier@DataChaz · Nov 13, 2025

If you’re still sending raw JSON into your LLMs, you’re burning tokens, latency, and budget! Try TOON (Token-Oriented…

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Summary

TOON (Token-Oriented Object Notation) is a new data format that reduces token usage by 30-60% compared to JSON, lowering costs and latency for LLM applications. The thread introduces the open-source tool, benchmarking resources, and conversion utilities to help developers optimize their data formatting.

Summarized by ThreadOut AI from the full thread. May miss nuance — read the thread below.

  1. #1

    If you’re still sending raw JSON into your LLMs, you’re burning tokens, latency, and budget! Try TOON (Token-Oriented Object Notation). Clear like YAML, compact like CSV: • 30–60% fewer tokens • Up to 50% lower costs • Shines for tabular data. Free and Open source 🧵↓

  2. #2

    💡 Benchmark tip. Check out @chaseadams’s ace Format Tokenization Playground: → curiouslychase.com/playground/for… It lets you compare token counts for various formats: - CSV - JSON - YAML - and TOON ... all with your own sample data 🔥

  3. #3

    Toon GitHub repo: github.com/toon-format/to… github.com/toon-format/to…

  4. #4

    ♻️ If this sparked an idea, hit repost so others can catch it too! Follow me → @datachaz for daily drops on LLMs, agents, and data workflows! 🦾

    Charly Wargnier@DataChaz · Nov 13, 2025

    If you’re still sending raw JSON into your LLMs, you’re burning tokens, latency, and budget! Try TOON (Token-Oriented Object Notation). Clear like YAML, compact like CSV: • 30–60% fewer tokens • Up to 50% lower costs • Shines for tabular data. Free and Open source 🧵↓

  5. #5

    touché!

    Spasyuk Denis@SpasyukD · Nov 14, 2025

    @DataChaz :) you can do it in JSON:

  6. #6

    You might also want to check Flux by @m_namakshenas github.com/namakshenas/FL…

  7. #7

    @m_namakshenas .@akifumi_ai also created a cool tool that converts from JSON to TOON 🔥 → jso.app/ja/json-to-toon

  8. #8

    @m_namakshenas @akifumi_ai Follow-up to that rather popular tweet:

    Charly Wargnier@DataChaz · Nov 13, 2025

    If you’re still sending raw JSON into your LLMs, you’re burning tokens, latency, and budget! Try TOON (Token-Oriented Object Notation). Clear like YAML, compact like CSV: • 30–60% fewer tokens • Up to 50% lower costs • Shines for tabular data. Free and Open source 🧵↓