Convert J2K to G4
Convert J2K images to G4 format, edit and optimize images online and free.
Drop Files Anywhere to Upload
The J2K file extension stands for JPEG 2000 Code Stream Syntax, a part of the JPEG 2000 standard developed by the Joint Photographic Experts Group (JPEG). Introduced in 2000, JPEG 2000 offers superior image compression and quality compared to the original JPEG format. The J2K codestream is highly flexible, supporting both lossy and lossless compression, and allows for scalable decoding, which means images can be efficiently accessed at various resolutions and quality levels. This makes J2K ideal for applications requiring high-quality image storage and transmission, such as medical imaging, digital cinema, and satellite imagery.
The G4 file extension, standing for CCITT Group 4 Fax Image, is a specialized format used primarily for storing black-and-white facsimile (fax) images. Its origins trace back to the Consultative Committee for International Telegraphy and Telephony (CCITT), now known as the ITU-T, which developed the Group 4 standard in the 1980s to improve fax transmission efficiency over digital networks. This format employs a high compression ratio to reduce file size while maintaining image quality, making it ideal for archiving documents and transmitting faxes in professional and business environments.
Choose any J2K image from your computer, or drag & drop a J2K file onto this page.
Check the file preview quickly and use J2K to G4 tools if you need to change the conversion settings.
After the convert is complete, click on the Download button to get your G4 image.
To change J2K format to G4, upload your J2K file to proceed to the preview page. Use any available tools if you want to edit and manipulate your J2K 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 J2K file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Windows system.
cd to J2K file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Linux system.
cd to J2K file location or include path to your input file.