Source Mapper is a free Chrome add-on designed to simplify the process of obtaining original source code from source maps. It is particularly useful for developers working with JavaScript, as it allows for effective error handling by providing both line and column numbers. This capability is essential when capturing JavaScript errors, especially in older browsers like IE8, where standard error capturing methods may fall short. The add-on is compatible with Source Map Version 3 and has been tested with various JavaScript source files.

The utility enhances error tracking by facilitating the correlation of errors with their corresponding source code, which is crucial for debugging complex applications. By leveraging this tool, developers can streamline their debugging process, ensuring that they can trace back to the exact point of error in their scripts. Source Mapper is a valuable addition to the toolkit of any web developer focused on improving code maintenance and error resolution.