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 NEF images to JNG format. This tool works for both professionals and casual users. Convert your images to JNG in seconds.
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Nikon Electronic Format
Nikon's robust raw format, known for exceptional dynamic range preservation.
NEF (Nikon Electronic Format) is the exclusive raw image format for Nikon cameras. Whether you are shooting with a beginner D3000 or a professional Z9, your raw files are NEFs. Nikon is famous for the dynamic range of its sensors, and the NEF format is designed to hold onto every bit of that data. A NEF file acts as a digital negative, storing 12-bit or 14-bit data that allows photographers to recover incredible amounts of detail.
NEF is based on the TIFF file format. It contains the raw sensor data, a JPEG preview, and an 'instruction set' of metadata. This instruction set includes camera settings like White Balance, Picture Control, and Active D-Lighting. Uniquely, Nikon offers three compression modes for NEF: Uncompressed (Pure data), Lossless Compressed (Huffman coding to reduce size with zero quality loss), and Compressed (Visually lossless).
NEF has been Nikon's standard since the dawn of their digital SLRs (D1 in 1999). While the internal structure has evolved to support higher resolutions and new features, the .nef extension has remained constant, providing a sense of stability for Nikon users.
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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