WebAssembly · Zero-copy · Spec compliant

TOON Playground

Flip JSON ↔︎ TOON without leaving the browser. Centered controls keep conversions one click away while quick examples show off tabular + nested payloads.

Compact grid layout WASM-accelerated Strict diagnostics Pipe or minimal delimiters

Live converter

Paste JSON, load a fixture, or drop TOON text and round-trip instantly.

Examples

Click to prefill the JSON editor with a curated sample.

JSON input

Encoder & parser options

Use pipe delimiter (|) for aligned tabular blocks

Strict mode · enforce spec and emit detailed errors

Pretty JSON · keep decoded output indented

Live converter

JSON input

Encoder & parser options

TOON output