Convert CALS to G4
Convert CALS images to G4 format, edit and optimize images online and free.
Drop Files Anywhere to Upload
The CALS (Continuous Acquisition and Life-cycle Support) Type 1 Image file format, developed by the United States Department of Defense in the mid-1980s, is a standard for storing raster (bit-mapped) image data, typically black-and-white. It ensures efficient data interchange and retention of orientation metadata. The format supports both uncompressed and compressed (using CCITT Group 4 compression) images. This standard was part of the broader CALS initiative aimed at improving electronic publishing and data management within the federal government.
The G4 file extension is linked to the CCITT Group 4 Fax Image format, recognized by the International Telecommunication Union (ITU) for its ability to compress monochrome images without data loss. This format is integral to fax technology, employing a two-dimensional coding system that identifies image patterns, resulting in high compression ratios and minimized file sizes, key for efficient document transmission.
Select a CALS image from your computer, or drag & drop it on the page.
Pick any CALS to G4 tools if you need to edit your CALS file, then click the Convert button.
Wait for the converter to finish and download your G4 image.
To change CALS format to G4, upload your CALS file to proceed to the preview page. Use any available tools if you want to edit and manipulate your CALS file. Click on the convert button and wait for the convert to complete. Download the converted G4 file afterward.
Follow steps below if you have installed Vertopal CLI on your macOS system.
cd to CALS file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Windows system.
cd to CALS file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Linux system.
cd to CALS file location or include path to your input file.