Toon

What it is

Token-Oriented Object Notation (TOON) is a compact and schema-aware encoding of JSON designed to optimize the efficiency of Large Language Model (LLM) prompts. It enhances readability while reducing data size.

TOON stands out as a compact, human-readable JSON encoding that optimizes LLM prompts while maintaining readability and schema-awareness.

When it fits — and when it doesn’t

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

1. 01

   Limited language support beyond JavaScript/TypeScript

   Primary SDK is in JavaScript, and while there's a community-maintained TypeScript version, other languages are not officially supported.

2. 02

   Complex setup for non-trivial schemas

   Configuring schema-aware encoding can be intricate, especially with nested or polymorphic types.

3. 03

   Documentation lacks depth and examples for advanced use cases

   The official documentation focuses on basic usage but fails to cover complex scenarios or best practices in detail.

4. 04

   Performance overhead during encoding/decoding processes

   While TOON aims for compactness, the additional processing required for schema-aware operations can introduce latency compared to standard JSON.

What it does well

• Compact JSON encoding for efficiency in LLM prompts

• Schema-aware to maintain data integrity and readability

• Human-readable format for easy debugging and comprehension

Pricing

Free tier

YesOpen source — free to use

Paid from

$0

Model

Flat rate

Enterprise plan

No

Pricing not independently confirmed — check the vendor’s page.