JSON to TypeScript
Generate TypeScript interfaces and types from JSON — 100% local processing
JSON Input
TypeScript Output
How to use JSON to TypeScript
Paste your JSON on the left, configure options (root name, interface vs type, optional/readonly), and click Convert. Nested objects automatically generate separate interfaces.
Why convert locally?
API responses often contain sensitive data structures. Devault generates TypeScript types entirely in your browser — no data ever sent to a server.