Stop Writing TypeScript Interfaces by Hand — Generate from JSON

Paste JSON into the JSON to TypeScript Converter and get typed interfaces in seconds — no npm, no account.

What it generates

• Strings, numbers, booleans typed correctly
• Null fields become optional (field?: Type)
• Arrays typed from elements: string[], User[]
• Nested objects become their own named interfaces
• Mixed arrays become union types

Limitations

Output is a starting point — add ? for fields the API sometimes omits, and replace string with enum unions where you know the valid values.