Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your DNG images to JNG format. This tool works for both professionals and casual users. Convert your images to JNG in seconds.
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DNG (Digital Negative)
The universal raw format designed to stand the test of time.
DNG (Digital Negative) is an open, royalty-free raw image format developed by Adobe. It was created to solve a major problem in digital photography: every camera manufacturer uses their own proprietary raw format (CR3, NEF, ARW, etc.), and when a new camera comes out, old software can't read its files. DNG acts as a universal container for raw sensor data. It preserves all the original image information—just like a proprietary raw file—but wraps it in a standardized, publicly documented structure. This ensures that your photos will remain readable by software decades from now, even if the camera manufacturer goes out of business.
DNG is based on the TIFF/EP standard. It stores the raw sensor data (Bayer pattern or X-Trans) along with metadata defining how that data should be interpreted (color matrices, white balance, linearization tables). Uniquely, DNG also supports 'Linear DNG' (partially processed/demosaiced data) and 'Lossy DNG' (which applies JPEG-like compression to raw data, significantly reducing file size while retaining raw editing flexibility).
Adobe launched DNG in 2004. While initially met with skepticism, it has been adopted natively by several manufacturers (Leica, Pentax, Hasselblad, and most smartphones including iPhone and Pixel) and is the standard format for mobile raw photography.
JPEG Network Graphics
JPEG compression with PNG transparency.
JNG (JPEG Network Graphics) is a sub-format of the MNG animation format. It was designed to combine the high compression of JPEG with the alpha transparency features of PNG, something that standard JPEG lacks. It essentially wraps a JPEG stream and a mask channel in a chunk-based container.
A JNG file structure mimics PNG. It uses a 8-byte signature and chunks. The image data is split into a color chunk (JDAT) which contains JPEG data, and an alpha chunk (IDAT) which contains PNG-compressed alpha mask. This allows for 'lossy color, lossless alpha' images, which is very space-efficient for photographic sprites.
Created by the PNG Development Group around 2001 as part of the MNG (Multiple-image Network Graphics) project. It failed to gain traction as MNG was rejected by Mozilla and Chromium in favor of APNG and later WebP.
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