TOON Tools

About

Work with TOON data, without the friction. TOON Tools is a focused editor and utility suite for Token-Oriented Object Notation (TOON) - a compact, human-readable representation of JSON data designed for LLM prompts and token-efficient structured data. Whether you're preparing data for an AI prompt, inspecting a TOON file, converting structured data, or comparing changes, TOON Tools gives you the essential tools in one clean workspace. Built for TOON • Edit TOON with syntax highlighting • Open and work with TOON files • Parse and inspect structured data • Convert TOON to JSON, YAML, XML, and CSV • Compare documents with built-in diff tools • Work with multiple files using tabs • Quickly access recent files • Developer-focused editing and keyboard workflows Made for LLM workflows JSON is great for applications, but its repeated keys, braces, quotes, and other syntax can add unnecessary tokens when large structured datasets are included in LLM prompts. TOON provides a more compact representation while preserving the JSON data model, making it especially useful for AI and LLM workflows. Use TOON Tools to prepare, inspect, edit, and convert TOON data without jumping between different utilities. One app. Everything you need to work with TOON.