Tools & Playgrounds

Experiment with TOON format interactively using these tools for token comparison, format conversion, and validation.

Playgrounds

Official Playground

The TOON Playground lets you convert JSON to TOON in real-time, compare token counts, and share your experiments via URL.

Community Playgrounds

CLI Tool

The official TOON CLI provides command-line conversion, token statistics, and all encoding/decoding features. See the CLI reference for full documentation.

npx @toon-format/cli input.json --stats -o output.toon

Editor Support

VS Code

TOON Language Support - Syntax highlighting, validation, conversion, and token analysis.

Install from the VS Code Marketplace or via command line:

code --install-extension vishalraut.vscode-toon

Tree-sitter Grammar

tree-sitter-toon - Grammar for Tree-sitter-compatible editors (Neovim, Helix, Emacs, Zed).

Neovim

toon.nvim - Lua-based plugin for Neovim.

Other Editors

Use YAML syntax highlighting as a close approximation. Most editors allow associating .toon files with YAML language mode.

Web APIs

If you're building web applications that work with TOON, you can use the TypeScript library in the browser:

import { decode, encode } from '@toon-format/toon'

// Works in browsers, Node.js, Deno, and Bun
const toon = encode(data)
const data = decode(toon)

See the API Reference for details.

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