BleachBit is an open-source system cleaning utility that removes unnecessary files to free disk space and maintain user privacy. The tool operates by deleting temporary files, cache data, logs, and other system artifacts that may contain sensitive information or consume storage space. The application provides both graphical and command-line interfaces for user interaction. Users can preview files before deletion, allowing them to review what will be removed and adjust their selections accordingly. The tool includes configurable cleaning options that can be toggled based on specific requirements. BleachBit supports localization through Weblate, a web-based translation platform, making it accessible to users in multiple languages. The software can run directly from source code without installation by building translations and executing the main Python script. The tool includes cleaner definitions that specify which files and locations to target during the cleaning process. These definitions help ensure systematic removal of unwanted data while preserving important system files and user data.