OnSubmitSteps
- Paste a representative JSON example.
- Set the root interface name.
- Choose readonly if needed.
- Copy the generated TypeScript.
Development · free tool
JSON to TypeScript interface generator
Generate TypeScript interfaces from a representative JSON example.
Input and result
Use it well
How to use JSON to TypeScript
Common use cases
- API clients
- Create interfaces from sample responses.
- Frontend typing
- Improve autocomplete and type safety.
- Documentation
- Show expected object shapes in technical docs.
FAQ
Frequently asked questions
Does the tool infer optional fields?
Inference is based on the provided example. Missing variants may need manual adjustment.
Can arrays be typed?
Yes. Arrays are inferred from their items.
Should I validate generated types?
Yes. Review the output before using it in production code.
Are my inputs sent to a server?
OnSubmit tools run in the browser whenever the task can be processed locally. Avoid pasting production secrets, real banking details or personal data into public tools.