I built a tool to generate TypeScript types from JSON/JS data, initially to tackle the deeply nested arrays in for a few JSON RPC API (e.g., array[0].content.section.contents[0].item.contents[0] could be a aItem or bItem). Some existing tools generate named union types at every level, which can get messy. This tool automatically converts fields to optional at the right depth, making the types cleaner and easier to use.

Features: - Web UI: Paste JSON, get TypeScript types instantly - CLI or importable in TypeScript projects - Handles complex types (nested objects, arrays, etc.) - Supports optional fields and union types where needed

Try the Web UI: https://gen-ts-type.surge.sh

Also published on github and npm as gen-ts-type

Feedback welcome!