Type a function parameter
Check a typed function and run the generated JavaScript.
function total(values: number[]): number {
return values.reduce((sum, value) => sum + value, 0);
}
console.log(total([4, 8, 15]));Expected: 27
Try in editorCode StudioNew
TypeScript Compiler Online
ToolerWork Code Studio gives you a TypeScript compiler online for quick typing checks, functions, interfaces, and small learning examples. TypeScript is transpiled in the browser before execution.
TypeScript code
Output
function greet(name: string): string {
return `hello ${name}`;
}
console.log(greet("ToolerWork"));hello ToolerWork === Code Execution Successful === Execution Time: 31ms
Best for
Use TypeScript online for
- Try TypeScript functions
- Practice types
- Check simple TS snippets
- Learn typed JavaScript
Why use it
Fast browser workflow
- Browser transpilation
- Problems panel
- Clean output
- No project setup
How to use
Run in four steps
- 1. Open the TypeScript editor.
- 2. Write TypeScript code.
- 3. Run transpilation and execution.
- 4. Fix problems if diagnostics appear.
Supported workflow
What this TypeScript online editor supports
TypeScript is checked and transpiled in the browser, then its JavaScript output runs in a Worker. It is designed for focused snippets and learning tasks where a fast browser workspace is more useful than a full local project.
- Try interfaces, type aliases, typed functions, unions, and generics
- See TypeScript diagnostics in the Problems panel
- Run successfully transpiled code and capture console output
- Format, save, copy, and download TypeScript files
Runtime, files, and honest limits
- Browser runtime
- TypeScript transpilation followed by JavaScript Worker execution
- File types
- .ts
- Privacy
- Your source stays in the browser workspace during normal use; ToolerWork does not need a code-execution backend for this runner.
- Limit: This snippet runner does not provide npm packages, a bundler, or a custom tsconfig.json.
- Limit: Browser and Node.js project APIs are outside the Worker-based execution environment.
Runnable examples
TypeScript examples to try online
Start with the built-in project, replace its sample with one of these focused examples, and compare your result with the expected output.
Use an interface
Model a small object and verify its shape before execution.
interface User { name: string; active: boolean }
const user: User = { name: "Aman", active: true };
console.log(user.name);Expected: Aman
Try in editorFAQ
TypeScript online editor questions
Can I run TypeScript online?
Yes. ToolerWork transpiles TypeScript in the browser and runs the resulting JavaScript.
Does it show TypeScript errors?
Blocking diagnostics appear in the Problems panel before code runs.
Do I need npm or tsconfig?
No. The online runner is designed for quick snippets and learning examples without local setup.
Can I run full TypeScript apps?
Not in the MVP. It is focused on small TypeScript snippets and browser-friendly examples.
How does ToolerWork run TypeScript in the browser?
TypeScript is checked and transpiled in the browser, then its JavaScript output runs in a Worker. The workspace also keeps the active project in local browser storage.
What are the limits of this TypeScript online editor?
This snippet runner does not provide npm packages, a bundler, or a custom tsconfig.json. Browser and Node.js project APIs are outside the Worker-based execution environment.
Related code pages