Converters
Free Online JSON to TypeScript Converter
Turn JSON examples into readable TypeScript interfaces locally, including nested objects and arrays.
100% Client-Side. Your data is processed locally and is never sent to an ElDevo processing server.
Input
Output
Ctrl/Cmd + Enter to run · Esc to clear · Processing stays in your browser.
Advertisement
How to Use
- 1Paste representative JSON.
- 2Choose the root interface name.
- 3Review generated interfaces.
- 4Copy or download the .ts file.
Features & Privacy Guarantee
- ✓ Nested interface generation
- ✓ Array type inference
- ✓ Identifier-safe property names
- ✓ Copy and download
Search intent: Generate TypeScript interfaces from representative JSON.
Technical Example
Input
{"id":1,"name":"Ada"}Output
export interface Root {
id: number;
name: string;
}Frequently Asked Questions
Does it infer nested objects?
Yes. Nested records become separate interfaces.
What about arrays?
Arrays are inferred from their first representative element.
Can I name the root interface?
Yes.
Does it upload the JSON?
No. Generation is local.