UTL
UTL.toolsThe Digital Toolbox
Updated: August 2026 • Verified v1.2

JSON to TypeScript Interface & Type Generator

Developer ToolsHigh Usage

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.
AST Type Synthesis: JSON Object ➔ TypeScript Interface Tree
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Understanding Your Results

Parses JSON in browser memory, detects primitive types, generates nested sub-interfaces, and provides copy-ready TypeScript export code.

Practical Guidance & Next Steps

Assigns descriptive PascalCase names to nested object structures for clean project architecture.

What is this?

A developer productivity utility that generates strongly typed TypeScript interfaces from raw JSON data.

How does it work?

1. Enter desired root interface name. 2. Paste JSON object or array into the input box. 3. Copy the generated TypeScript interfaces in 1 click.

Why use it?

Eliminates tedious manual typing of TypeScript interfaces when consuming API payloads.

Technical Scope & Calculation Limitations

Parses standard valid JSON objects and arrays.

Frequently Asked Questions

It recursively generates separate, cleanly named TypeScript `export interface` definitions for each nested object.
Windows Desktop & Widget Options

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Desktop App
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