TypeScript Syntax Validator
Paste TypeScript code to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
interface User { id: number name: string }Example Output
✗ INVALID — ';' expected
How to Use
- 1Paste the TypeScript code you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About TypeScript Syntax Validator
TypeScript Syntax Validator uses the official TypeScript compiler to parse your code and report syntactic diagnostics (not type errors). It catches missing brackets, unexpected tokens, and malformed type annotations.
Note: this is a syntax check, not full type-checking. Complete type checking needs module resolution and is impractical in the browser.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.