Nested JSON to TypeScript Type Converter

Complex, deeply nested JSON can be a nightmare to type manually. Our converter handles deep recursion, generating a clean hierarchy of types for your project.

Convert Nested JSON

When to use this solution:

Perfect for handling complex configuration files, analytics payloads, or deeply structured database exports.

Common Use Cases

Typing deeply nested configuration filesProcessing complex analytics event dataMapping large database document structuresStructuring multi-level UI configuration state

1Step-by-Step Guide

Insert Complex JSON

Paste your deeply nested JSON structure into the transformation pane.

Analyze Hierarchy

The tool analyzes every level of the object to determine the correct types for strings, numbers, and sub-objects.

Export Types

Get a organized set of TypeScript interfaces that accurately reflect the entire object tree.

Ready to get started?

Use our free tool to solve this problem in seconds. No installation required.

Convert Nested JSON

Frequently Asked Questions

How does it handle arrays?

It intelligently detects array types, creating interfaces for object arrays (e.g., 'Array<Item>') or primitive arrays (e.g., 'string[]').

Does it detect optional fields?

Currently, it maps fields as they appear. You can manually add '?' for optional fields based on your API requirements.