2026-05-20 · 1 min read
JSON to TypeScript for API types
Turn a sample response into interfaces, then refine names in code review.
TypeScriptJSONAPI
Key takeaways
- Use real API samples with nullable fields—happy-path-only JSON hides optional properties.
- Rename generated interfaces to domain language before publishing a shared package.
Suggested workflow
Format the payload, validate JSON, then generate interfaces with a root name like ApiUser.
Jump to JSON Formatter with ?prefill= when chaining tools on the same payload.
FAQ
Does it infer unions for mixed arrays?
Yes—when array items differ, it emits union element types.
Should I commit generated types?
Commit after review; regenerate when the API contract changes.