JSON to TypeScript Converter – Paste JSON, Get Interfaces
If you work with APIs or JSON data regularly, you’ve probably written TypeScript interfaces by hand more times than you’d like. I built JSON to TypeScript Converter to cut out the repetitive part.
The tool does one thing: you paste JSON, and it generates clean TypeScript interfaces. That’s it. No account needed. No data stored. It runs entirely in your browser — your JSON never touches a server.
You can use it here:
👉 https://tool-json-to-typescript-converter.vercel.app
It handles nested objects, arrays, optional fields (based on null values), and basic type inference. You’ll still want to review and tweak the output — especially if your API returns inconsistent shapes — but it’s a solid starting point.
There’s a free tier that covers most use cases. For $9/month, the Pro version adds:
- Support for multiple JSON samples (helps infer better types when data varies)
- Optional strict null checking
- Interface naming control
- Export as
.tsfile - No waiting between conversions
I use it daily, mostly when integrating third-party APIs or mocking responses in frontend projects. It’s not perfect — no tool like this can be — but it saves time and reduces typos.
No ads. No tracking. Open-source (frontend is on GitHub, backend is minimal and secure).
If you find it useful, great. If not, no worries — at least now you know there’s a simple option out there.
Check it out:
https://tool-json-to-typescript-converter.vercel.app
Feedback welcome. Bugs? File an issue. Feature requests? I’ll consider them, but the goal is to keep it focused.
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