~/projects/json-type-generator$

JSON Type Generator

Paste JSON on the left, get typed code on the right. No server, no dependencies beyond the build toolchain.

~/built-with$

[sveltekit][typescript][tailwind css][vitest]

~/why$

Why I built this

I convert API responses into typed interfaces constantly, and I wanted that to work offline in a tab I already had open. Keeping it client-side meant most of the work went into type inference: unifying mixed arrays, telling ints from floats, and handling reserved keywords.

~/features$

Features

›Real-time JSON -> TS / C# conversion
›Editable output
›Format JSON
›Upload .json file
›Download (.ts / .cs)
›Copy to clipboard

~/highlights$

Technical highlights

✓Type unification across mixed value types
✓int vs float distinction
✓Mixed array handling
✓Edge cases: reserved keywords, invalid names, deep nesting
✓51 unit tests