Transpiler
A transpiler (source-to-source compiler) is a tool that converts source code from one programming language to another at the same abstraction level, typically for compatibility, optimization, or development convenience. It transforms code while preserving its original logic and structure, enabling developers to write in modern or preferred languages that compile to target environments like older browsers or specific runtimes. Common examples include Babel for JavaScript and TypeScript for transpiling to plain JavaScript.
Developers should use transpilers when targeting environments that don't natively support a language's features, such as converting ES6+ JavaScript to ES5 for older browsers, or when using languages like TypeScript or CoffeeScript that enhance developer experience but require compilation to run. They are essential for adopting new language syntax without breaking compatibility, improving code maintainability, and enabling cross-platform development in web, mobile, and server-side applications.