How it works
Paste or type your text in the box and JSON to TypeScript Interface transforms it instantly — no button to press. The result updates live as you edit, runs entirely in your browser, and you can copy the output with one click.
Examples
- “{"id":1,"name":"Ada","active":true}” → “interface Root { ⏎ id: number; ⏎ name: string; ⏎ active: boolean…”
Frequently asked questions
How do I use the JSON to TypeScript Interface?
Paste or type your text into the input box. JSON to TypeScript Interface processes it live and shows the result immediately — then just copy it. There is no limit on how much text you can process.
Is my data private?
Yes. The JSON to TypeScript Interface runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the JSON to TypeScript Interface free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on developer tools and the rest of the platform, you can use it as often as you like.
Popular in Developer Tools
Regex Tester
Test regular expressions against text with live match highlighting.
Hash Generator (SHA)
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
URL Encode / Decode
Percent-encode or decode URLs and query parameters.