Type Generator
FreeGenerate TypeScript types and union types
type Root = {
id: number;
tags: string[];
};About Type Generator
TypeScript's type system shines when you use unions, literals, and precise type aliases, but writing them out by hand for a set of values or a known shape gets repetitive. When you have a list of allowed strings or a structure in mind, manually formatting the type definition is busywork. The Type Generator creates TypeScript types and union types for you, turning your input into clean, ready-to-use definitions.
Provide your values or structure, and the tool outputs type aliases or union types you can paste straight into your code. It runs in the browser with no account and no cost, so it is free and immediate. This is useful when defining a set of allowed options, narrowing values with literal unions, or quickly sketching out types during development, and the generated definitions give you a clean base you can rename and extend to fit your codebase.
Common uses
- Create a union type from a set of allowed string or literal values
- Generate a type alias for a known data shape without manual formatting
- Define option types for component props or function parameters
- Sketch out TypeScript types quickly during early development
- Convert a list of constants into a clean literal union type
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- React and TypeScript ready
- Copy-paste components
- Markdown tools included
FAQ
Can it create union types?
Yes. It generates union types from your values, which is ideal for sets of allowed options or literal strings.
How is it different from the interface generator?
This focuses on type aliases and union types, while the interface generator produces object-shaped interfaces from JSON or descriptions.
Is the output ready to paste in?
Yes. You get clean TypeScript type definitions you can drop into your code and rename as needed.
Does it cost anything?
No. It runs in your browser for free with no signup.
Can I use Type Generator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.