JSON to TypeScript
Generate TypeScript types from JSON.
Paste a JSON sample and get TypeScript types inferred from its structure — nested objects and arrays included. Great for quickly typing API responses.
Runs entirely in your browser — nothing is uploaded.
How to use the json to typescript
- 1Paste a JSON object or array.
- 2Copy the generated TypeScript.
- 3Rename Root to fit your codebase.
Frequently asked questions
How are arrays typed?
Array element types are inferred from the first item; empty arrays become unknown[].
Are nested objects named?
Nested objects are inlined as structural types for simplicity — extract them into named interfaces as you like.