JSON → TOON Encoder
Feed any JSON (or JSON5-style object literal) and generate deterministic TOON that matches the v2.0 specification.
We validate and normalize your JSON before encoding. No uploads, no token counting guesswork.
TOON → Excel Export
Paste TOON and export directly to .xlsx – perfect for sharing tabular LLM prompts with analysts.
Follows strict indentation and row-length validation so Excel sheets stay consistent.
TOON Format Snapshot
Input JSON:
{
"users": [
{ "id": 1, "name": "Ada", "role": "admin" },
{ "id": 2, "name": "Bob", "role": "user" }
]
}
TOON Output:
users[2]{id,name,role}:
1,Ada,admin
2,Bob,userUse the first panel for JSON → TOON or the second to turn TOON tables into Excel.
Spec-Accurate Encoding
Uses the official @toon-format/toon package so your output matches the v2.0 spec byte-for-byte.
Round-Trip Friendly
Decode TOON with strict validation, then export to Excel or reuse as JSON without losing structure.
Excel Ready
Instant XLSX download from TOON data for sharing with stakeholders that prefer spreadsheets.
Local & Private
Encoding/decoding happens entirely in your browser. No data ever leaves your device.
Frequently Asked Questions
- What is TOON and why convert to it?
- TOON (Token-Oriented Object Notation) is a compact, tabular-friendly JSON alternative designed for LLM prompts. Converting JSON to TOON cuts repeated keys and saves tokens.
- Does this follow the official specification?
- Yes. The tool uses the open-source @toon-format/toon encoder/decoder so your output is spec-compliant and round-trippable.
- Can I trust it with private data?
- Absolutely. Everything runs locally in your browser; nothing is uploaded or logged.