Free Online TOON Formatter

Use the TOON formatter to keep TOON payloads consistent, token-efficient, and production-ready before they reach an LLM or API. Every run also emits a shareable JSON mirror so the rest of your stack can trust the same record.

What is TOON?

TOON (Token-Oriented Object Notation) is a compact format built for language models. It retains JSON structure yet strips excess punctuation, which cuts token counts while preserving meaning.

  • ā€¢Organises fields by declaration and removes braces or duplicate key names, keeping prompts lightweight
  • ā€¢Keeps indentation and field definitions intact so models parse tables and nested data accurately
  • ā€¢Works as an intermediate formatā€”shrink context now, then revert to JSON whenever full fidelity is required

Why teams rely on it

  • ā€¢Standardises indentation, field order, and naming even when TOON comes from scripts, agents, or manual edits
  • ā€¢Validates array lengths, rows, and quoting so structural mistakes surface before deployment
  • ā€¢Keeps long prompts lightweight without sacrificing the readability of tabular or list-based data
  • ā€¢Produces a JSON mirror for archiving, debugging, or handing data to services that expect JSON only

How it works

1

Paste raw TOON

Drop in any payload exported from a JSONā†’TOON converter, an agent log, or a custom script. Arrays, tables, and nested blocks are all supported.

2

Click 'Format TOON'

The tool parses the payload, applies consistent spacing, and replays it using the official TOON syntax.

3

Check the JSON mirror

Verify data types, array lengths, and metadata before you store the structured output or hand it downstream.

4

Copy and reuse

Use the polished TOON or its JSON counterpart in prompts, QA pipelines, staging data, or documentation.

Before vs. after formatting

Sample TOON before cleanup

customer:
 name:"Dana"
status:active
items[2]{sku,qty,price}:
  A-100 ,1 ,19.5
  B-200,  2 , 11
totals:
 amount :42
 currency:"USD"
metadata:
  source:internal
  checked:false
tags[3]: outline ,alpha , "priority client"
notes[2]: "ready","needs invoice"

Sample TOON after cleanup

customer:
  name: "Dana"
status: active
items[2]{sku,qty,price}:
  A-100,1,19.5
  B-200,2,11
totals:
  amount: 42
  currency: "USD"
metadata:
  source: internal
  checked: false
tags[3]: outline,alpha,"priority client"
notes[2]: "ready","needs invoice"

The formatter aligns spacing, normalises numbers, and ensures array declarations match the supplied data so downstream toolsā€”and humansā€”can trust the structure.

Where it fits best

Python workflows

Pair the formatter with toon_format to parse TOON inside FastAPI apps or notebooks, validate the JSON, and emit a tidy TOON version at the end.

Java & JVM services

Use TOON utilities alongside Jackson so telemetry and logs stay in sync between JSON and TOON while shrinking prompt budgets.

Serverless & REST APIs

Normalize user-submitted TOON at the gateway, enforce schema rules, and keep a validated JSON copy for auditing.

Frequently asked questions

What problems does the TOON formatter solve?

It cleans inconsistent TOON strings, validates them by parsing into JSON, then regenerates a neat TOON data format that is ready for prompts, repositories, or documentation.

Is the formatting step lossless?

Yes. The formatter uses the same engine as the JSON ā‡„ TOON converter, so fields and values stay intact while only the layout changes.

Does it handle large tables?

Absolutely. Arrays with declared field lists stay compact, and the formatter double-checks row counts so long tables still deliver tight, readable TOON formatting.

Can I automate formatting inside CI jobs?

Yes. Prototype your schema with the web UI, then mirror the same formatting logic in build or deploy scripts to verify TOON automatically.

Usage Guide

1. Paste the JSON data to be processed into the input box

2. Adjust options as needed (if any)

3. After processing, you can copy or download the results

Why Choose Us

Comprehensive Features

Provides various JSON processing tools to meet different development needs

Completely Free

All tools are completely free to use without any restrictions

Safe and Reliable

Data is processed on the client side and not uploaded to the server