TOON (Token-Oriented Object Notation) is a compact format that encodes JSON structures efficiently for LLM prompts. ToDiagram parses TOON directly so you can visualize the underlying hierarchy without manual conversion.

How do I share TOON diagrams with my team?

Save diagrams to the cloud or export them as PNG/SVG to include in tickets, docs, or prompt reviews. Shared links preserve the TOON content, diagrams, comments, and highlights.

Visualizing and Editing TOON Data

JSON

CSV

YAML

XML

CUSTOM

MERMAID

JSON

CSV

YAML

XML

CUSTOM

MERMAID

Use ToDiagram as your Token-Oriented Object Notation (TOON) editor. Convert compact TOON payloads into interactive diagrams for faster reviews, edits, and LLM-ready prompts.

OPEN EDITOR

Trusted by 2500+ happy users worldwide

Advanced TOON Viewer with Diagram Visualization

ToDiagram understands the @toon-format/toon spec and instantly transforms TOON content into interactive diagrams and trees. Decode folded keys, tabular blocks, and nested objects visually so you can reason about data structures without expanding every row by hand.

Understand compressed payloads

Expand TOON arrays, inline tables, and folded keys into a readable graph. Spot relationships between records, ports, and references even when the source text uses TOON’s compact syntax.

Edit TOON with confidence

Use the built-in editor to tweak TOON values or convert back to JSON on demand. Every change re-renders the diagram immediately so you can validate structure and token counts while you work.

Validate LLM prompt data

Pair diagram views with schema validation to ensure TOON payloads match the shape expected by your AI prompts or automations. Highlight mismatched fields before they reach production.

Export and share

Export PNG/SVG snapshots or share a link so teammates can inspect the same TOON data visually. Perfect for prompt reviews, agent debugging, or documentation.

Why ToDiagram is the best tool to visualize TOON files?

Cloud Storage

Store your data in the cloud, access it from anywhere, and share it with your team.

Text to Diagram AI

Convert your text descriptions into diagrams automatically, saving you time and effort in visualizing your data.

Powerful Visual Editing

Edit your data visually with our intuitive interface, making it easy to manage and manipulate your datasets.

Validate JSON Schema

Ensure your data adheres to the defined schema, preventing errors and ensuring data integrity. Easily identify and fix issues with our validation tools.

TOON Diagram Examples

OpenAI TOON Example

Explore an OpenAI chat prompt captured in TOON, from the model settings to the weather function schema, rendered as a simple, readable diagram.

Frequently Asked Questions

Find questions and answers about our platform, services, and more.

What is TOON?

Can I edit TOON files directly?

Does ToDiagram show TOON tables and folded keys?