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TypeScript Interface Generator

Used by developers, writers, and creators worldwide.

A TypeScript interface generator turns a quick list of fields into a properly formatted interface, so you do not have to type the braces, semicolons, and indentation by hand. Enter an interface name and your fields as simple name:type pairs — id:number, name:string, active:boolean — and it returns clean, ready-to-paste TypeScript. Developers use it to scaffold types for API responses, component props, and data models in seconds, and to teach newcomers how interfaces are structured. The name is capitalised to follow convention, field names are cleaned to valid identifiers, and any field left without a type defaults to string. Everything runs in your browser, so nothing is sent anywhere. Paste the result straight into your editor and refine the types as needed. It is a fast scaffolding aid for the boilerplate part of typing your data, not a replacement for thinking through your model.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Enter the interface name.
  2. List your fields as name:type pairs, separated by commas.
  3. Click Generate to produce the formatted interface.
  4. Copy the result into your editor and refine the types.

Use Cases

  • •Scaffolding a type for an API response shape
  • •Defining component props as a TypeScript interface
  • •Turning a quick field list into a clean data model
  • •Teaching how TypeScript interfaces are structured
  • •Saving boilerplate when sketching out several types

Tips

  • →Add a question mark to a field name, like email?, for an optional property.
  • →Use array syntax like tags:string[] directly in the type.
  • →Capitalise the interface name to follow the PascalCase convention.
  • →Review and tighten the generated types before relying on them.

FAQ

how do i specify field types

Write each field as name:type, separated by commas — for example id:number, tags:string[]. Any field without a colon defaults to the string type, and field names are cleaned to valid TypeScript identifiers so the output always compiles.

can i use complex or union types

Yes. Whatever you put after the colon is used verbatim, so you can write unions like status:"open" | "closed" or arrays like items:Item[]. The generator does not validate the type expression, so make sure it is valid TypeScript.

does it follow naming conventions

The interface name is capitalised to match the common PascalCase convention for types. Field names keep your casing but are stripped of invalid characters. Review the output and adjust naming to match your project's style guide.