Developer
Processed locally in your browserJSON to TypeScript
Convert raw JSON payloads into strongly-typed TypeScript interfaces with accurate type inference for strings, numbers, booleans, and nested objects.
How to Use JSON to TypeScript
1
Paste any sample JSON object into the input pane.
2
Specify your root interface name (e.g. UserProfile, ApiResponse).
3
Copy the generated TypeScript interface code directly into your codebase.
What This Tool Does
Recursively traverses JSON structures, infers primitive and complex types, deduplicates nested types, and formats clean TypeScript interface definitions.
Common Use Cases
Scaffolding API response types in Next.js, React, and Node.js projects.
Generating strong typing for third-party webhook payloads.
Speeding up TypeScript frontend development.
Privacy & Local-First Processing
Processed locally. Your proprietary JSON schemas and mock data are never sent to external servers.
Frequently Asked Questions
Does it handle optional and nullable fields?
Yes, fields containing null values or varying across array items are typed with union types like string | null.