A decompiler is a software tool that translates compiled code back into a more human-readable form, often resembling the original source code. This process is useful for understanding how a program works, debugging, or recovering lost source code. Decompilers can work with various programming languages and are commonly used in software development and security analysis. Decompilers operate by reversing the compilation process, which converts high-level code into machine code that a computer can execute. While they can provide insights into the structure and logic of a program, the output may not be identical to the original source code due to optimizations made during compilation.