JS2TS

JS2TS is an online tool that converts JavaScript source code into TypeScript using artificial intelligence. The service accepts plain JavaScript input and automatically generates corresponding TypeScript code complete with type annotations, interfaces, generics, and other type‑safe constructs. Users paste their JavaScript fragments into a web‑based editor, click a single conversion button, and receive the transformed TypeScript output within seconds. No user registration or login is required, making the tool accessible for quick prototyping and migration tasks. The AI engine analyzes the original JavaScript logic, infers variable types from usage patterns, and inserts explicit type declarations where possible. For function parameters, return values, object structures, and array operations, the converter produces typed interfaces and generic type parameters that match the data flows in the original code. This reduces the manual effort needed to annotate legacy JavaScript codebases, especially during incremental migration from JavaScript to TypeScript. Beyond basic JavaScript‑to‑TypeScript conversion, the platform offers additional related utilities. It includes a JSON‑to‑TypeScript converter that transforms JSON objects or schemas into typed TypeScript interfaces or type aliases, which is useful when integrating external API responses or configuration files. There are also CSS‑related tools that may assist developers working with styled components or inline styles in TypeScript projects. The tool provides a sample code button so new users can instantly see how the conversion works without preparing their own input. Each conversion includes a “Prompt” mode that may allow users to give natural‑language instructions or specific typing preferences, though the primary workflo