JSON to TypeScript Types

Generate TypeScript interfaces and types from your JSON data instantly. Paste JSON, get clean types.

Tool workspace

Idle

Local-only. Your JSON never leaves the browser.

Root name

Auto-sanitized into a valid TypeScript identifier.

Output mode

Export interface or type aliases.

Arrays strategy

Union produces better mixed-array types.

Strict modeOptional keys in arrays

Paste your JSON

Paste your JSON

Generated TypeScript

Outputs are best-effort. Review before production use.

Process

Enter or paste your JSON data into the input editor

Set root name, output style, strict mode, and array inference

Use the generated types in your TypeScript project

Use Cases

Converting API responses to TypeScript types

Creating type definitions for configuration files

Generating interfaces for database schemas

Quick prototyping with type safety

Documenting data structures

Migrating JavaScript projects to TypeScript

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