NEF to JPG

Nikon has used the NEF format (Nikon Electronic Format) since its early digital SLRs, and the Z mirrorless cameras still write it. Coolpix compacts with a RAW mode use the related NRW extension. NEF files open in Nikon NX Studio and common RAW editors, but to share them with people who do not edit photos, you need JPG. This page develops NEF and NRW files on your own device.

The NEF compression options

Nikon cameras offer several NEF types in their menus. Lossless compressed keeps every bit of the sensor data in a smaller file and is the usual choice. Compressed (lossy) discards a little highlight precision for even smaller files and is the default on many entry-level bodies. Uncompressed is large and identical in quality to lossless. All three develop here; we tested each with files from the D750, the D850 and the Z5 and Z6 mirrorless cameras.

High Efficiency NEF

The Z8 and Z9, and some later models, add High Efficiency and High Efficiency★ options. These use the licensed TicoRAW codec, which open-source decoders, including LibRaw, cannot read. Converting them here fails with a clear message rather than a broken image. Nikon NX Studio, which is free, exports them to JPG or TIFF.

Picture Controls and Active D-Lighting

Nikon cameras shape their JPEGs with a Picture Control (Standard, Vivid, Portrait and so on) and often with Active D-Lighting, which brightens shadows in high-contrast scenes. Neither is stored as pixels in the NEF, so a neutral development looks different: more natural, sometimes darker in the shadows. The “Embedded camera JPEG” mode gives the camera’s rendering instead. Most Nikon bodies store a full-size preview, so the embedded JPEG has the full resolution.

Damaged or unusual files

If the development step returns corrupt data, which happens with a few unusual files and shows as a single flat color over most of the picture, the converter detects it and automatically uses the embedded camera JPEG, with a note explaining why. This protects you from saving a ruined image without noticing.

Practical workflow

After a wedding or a holiday, copy the NEF files to your computer and drop them onto the page. Choose JPG at 90 percent quality, and set a longest side of 3000 pixels if the pictures are for screens only. Convert, check a few results and download the .zip. Developing a 24-megapixel NEF takes a few seconds; the 45-megapixel D850 files take longer and need more memory, so convert them in smaller groups on a laptop with limited RAM.

Comparison with other brands

Canon users can go to CR2 to JPG, Sony users to ARW to JPG, and the general RAW to JPG page explains RAW development in more depth. To remove the GPS position and serial numbers from JPGs before posting, run them through EXIF Data Remover, although files developed here already come without camera metadata.

Nikon NRW from Coolpix cameras

Coolpix models with a RAW option, such as the P7000 series and the P1000, save NRW instead of NEF. The structure is similar and the files develop the same way. Because compact sensors are small, these files benefit more from the camera’s noise reduction, so the embedded JPEG often looks cleaner than a neutral development at high ISO.