Healthy Filename is a WordPress plugin designed to enhance media file management by modifying uploaded filenames. It operates by utilizing the 'wp_handle_upload_prefilter' hook to ensure that all special characters are removed from filenames, promoting better organization and compatibility across various platforms. The plugin effectively transforms filenames to a more standardized format, which can be particularly useful for improving SEO and media library navigation.

Key features include the removal of accents and special characters, as well as the conversion of all filenames to lowercase. For example, a filename like 'rick & morty.png' would be transformed to 'rick-morty.png', while 'finaL fantasy / (Copié) (Copié).jpg' would become 'final-fantasy-copie-copie.jpg'. This ensures that users maintain a clean and consistent file naming convention.