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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.
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.
Drop in any payload exported from a JSONâTOON converter, an agent log, or a custom script. Arrays, tables, and nested blocks are all supported.
The tool parses the payload, applies consistent spacing, and replays it using the official TOON syntax.
Verify data types, array lengths, and metadata before you store the structured output or hand it downstream.
Use the polished TOON or its JSON counterpart in prompts, QA pipelines, staging data, or documentation.
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"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 toolsâand humansâcan trust the structure.
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.
Use TOON utilities alongside Jackson so telemetry and logs stay in sync between JSON and TOON while shrinking prompt budgets.
Normalize user-submitted TOON at the gateway, enforce schema rules, and keep a validated JSON copy for auditing.
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.
Yes. The formatter uses the same engine as the JSON â TOON converter, so fields and values stay intact while only the layout changes.
Absolutely. Arrays with declared field lists stay compact, and the formatter double-checks row counts so long tables still deliver tight, readable TOON formatting.
Yes. Prototype your schema with the web UI, then mirror the same formatting logic in build or deploy scripts to verify TOON automatically.
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
Provides various JSON processing tools to meet different development needs
All tools are completely free to use without any restrictions
Data is processed on the client side and not uploaded to the server