ตัวแปลงไฟล์ออนไลน์ฟรี G4 เป็น JFI

G4 is a method to compress black and white images without losing quality. It is used for fax machines and as a one of the compression types for the TIFF format. G4 treats a picture as black dots and lines on a white page (less file size will be achieved if there are less black dots and lines).

JFI is a raster image file format. It was developed by JPEG (Joint Photographic Experts Group) and are used to exchange the JPEG encoded data between applications and computer platforms. JFI is usually used to store bitmap graphics with full pallette.