FLMask32 is a JPEG and BMP image-masking tool. By using masks, sensitive image materials can be made childproof and inaccessible to unauthorized individuals. Five types of masks can be applied. Q0 Mask is a well-known full-color image masking method. WIN Mask is a 256-color image masking method mostly used in online bulletin boards. MEKO Mask is a well-known full-color image masking method with a unique circulating random exchange technique. FL Mask creates a masked area with a characteristic whirlpool pattern. CP Mask which stands for Coded Pattern, is used for various masking patterns. FLMask offers batch processing, a slide show function, zoom functions, a powerful selection frame controller, color and image retouching filters, and a noise-suppressing save function for masking JPEG images.