JSON to TypeScript
Generate TypeScript interfaces from a JSON sample, with nested types inferred.
How to use
JSON to TypeScript lets you generate TypeScript interfaces from a JSON sample, with nested types inferred. Paste your data on the left and the converted output appears on the right, ready to copy or download.
Parsing happens locally in your browser, so even large or sensitive payloads never touch a server. It's completely free, with no sign-up, no watermarks and no limits on how often you use it.
Examples
Paste a sample document and the tool validates and reformats it, flagging any syntax errors it finds.
Once jSON to TypeScript shows your output, use the copy or download button to grab it — no retyping.
Frequently asked questions
Is JSON to TypeScript free to use?
Yes. JSON to TypeScript is completely free with no sign-up, no watermarks and no usage limits.
Is my data private?
Yes. Parsing happens locally in your browser, so even large or sensitive payloads never touch a server.
Does JSON to TypeScript work on mobile?
Yes. It works in any modern browser on desktop, tablet or phone, and keeps working offline once the page has loaded.
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