Typing an API response by hand is where interfaces drift from reality. The field the backend renamed stays in the type until a runtime error surfaces it. Inference keeps the type attached to the actual shape.
Paste JSON and it produces TypeScript interfaces including nested objects and arrays. Use it when you be a new endpoint consumer, then adjust optionality where the payload varies.
Try it now: open the free tool, runs 100{b8b7921c843ac9e5edcbca134af59decad3ed340e0e3b2e6c286158f277affea} in your browser.
Bottom line: paste once, get interfaces that match the payload.
Your turn: use the tool free here, no signup, nothing leaves your device.
How do you use JSON to TypeScript Interface?
Open the JSON to TypeScript Interface in your browser (Types from JSON). Type or paste your input, adjust the options, and copy the result. Everything runs locally on your device with no account and nothing stored, so the three steps below take seconds even for confidential work.
- Paste the data or snippet you want to process.
- Run the tool and watch the output update.
- Copy the result for use in your own code.
Try JSON to TypeScript Interface free. It opens right in your browser.