JSON to TOON Converter

TOON is a compact form of JSON for LLM prompts. Arrays of objects with the same keys become one header and one row per item, which uses fewer tokens than JSON.

Example

Input
{
  "name": "parsebox",
  "version": "2.1.0",
  "private": false,
  "maintainers": [
    { "name": "Ada Lovelace", "email": "[email protected]", "active": true },
    { "name": "Alan Turing", "email": "[email protected]", "active": false }
  ],
  "build": {
    "target": "es2022",
    "minify": true,
    "port": 5173
  }
}
Output
name: parsebox
version: 2.1.0
private: false
maintainers[2]{name,email,active}:
  Ada Lovelace,[email protected],true
  Alan Turing,[email protected],false
build:
  target: es2022
  minify: true
  port: 5173

Private by design

ParseBox runs entirely in your browser. Your text is never uploaded, logged or stored on a server, so it is safe to paste API responses, tokens and config files.

Related conversions

All 30 formats in ParseBox →