Remove Empty Lines Remove lines containing only whitespace. Enter your text here and click the "Remove Empty Lines" button above. Test by click the "Remove Empty Lines" button and watch these blank lines between this text disappear. Privacy of Data: This tool is built-with and functions-in Client Side JavaScripting, so only your computer will see or process your data input/output. Unix Dos. Please select an AI API and enter the API key in the settings.