.JNG File Extension

JPEG Network Graphic

Developer PNG Development Group
3.6  |  18 Votes
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What is a JNG file?

A JNG file is an image saved in the JPEG Network Graphic (JNG) format. Like .PNG images, JNG images can contain transparent sections. However, like .JPG images, JNG images are compressed using lossy compression.

More Information

Screenshot of a .jng file in XnViewMP
JNG file open in XnViewMP

The PNG Development Group created the JNG format for use alongside the .MNG format. JNG files often contain a still image that is a single frame of an MNG animation.

Unlike typical PNG files, JNG files are compressed using lossy compression. For this reason, they may be subject to the blurring and other distortions that sometimes affect JPG files, and they also typically have smaller file sizes than similar PNG files.

The image data a JNG file contains is encoded using JPEG compression and stored in a PNG container. Like PNG files, JNG files can contain an alpha channel that allows them to include transparent sections. However, not all JNG files contain an alpha channel or transparent sections.

How to open a JNG file

You can open a JNG file with ImageMagick (multiplatform), XnViewMP (multiplatform), or IrfanView (Windows).

How to convert a JNG file

You can use ImageMagick or XnViewMP to convert JNG files to other image formats. For example, XnViewMP can convert JNG files to the following formats (and many others):

  • .JPEG - JPEG Image
  • .GIF - Graphical Interchange Format
  • .PNG - Portable Network Graphic
  • .TIFF - Tagged Image
  • .BMP - Bitmap Image
  • .PCX - Paintbrush Bitmap Image
  • .TGA - Targa Graphic
  • .JP2 - JPEG 2000 Core Image
  • .JXR - JPEG XR Image
  • .WEBP - WebP Image

Programs that open JNG files


Verified by FileInfo.com

The FileInfo.com team has independently researched the JPEG Network Graphic file format and Mac, Windows, Linux, and Android apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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