JSON to TypeScript Converter – because typing interfaces by hand is tedious I built a small tool to save time: JSON to TypeScript Converter . You paste JSON, and it gives you TypeScript interfaces with inferred types, optional properties (based on null values), and nested object support. That’s it. No fluff. It handles arrays, unions (like string | null ), and nested objects. If your JSON has null in a field, it marks that property as optional. Arrays with mixed types become union types. Pretty standard, but consistent. Why another one? I tried a few existing tools and kept running into small issues — incorrect typing on empty arrays, no support for duplicate object shapes, or weird formatting. So I made one that just works the way I want. It’s free to use for basic conversion. Paste, copy, done. There’s also a Pro tier ($9/month) for people using it regularly.…