Label file created by Easy CD Creator, a program used for creating and printing CDs; contains the locations of all template, theme, picture, and icon resources associated with a jewel case image; used to print a CD label, or jewel case cover. What is a JWL file. Follow These Easy Steps to Open JWL Files · Step 1: Double-Click the File · Step 2: Choose the Right Program · Step 3: Figure Out the File Type · Step 4: Check with. jwl Extension - List of programs that can open. A file with an extension of.