Lightframes
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Convert Nikon NEF to JPG online, free

To convert a NEF file to JPG, open it in the Lightframes editor, click Export and choose JPEG. Your Nikon RAW is developed from the sensor data in your browser and saved as a full-resolution JPG, one file or a whole folder at a time. It's free, open source and nothing is uploaded.

Open the editor

Free, no account, nothing uploaded

How to do it

  1. Open your NEF files

    Open the editor and click Open to choose your .nef or .nrw files, or Folder in the filmstrip to load the whole folder from your card.

  2. Adjust if you want

    Press Auto in the Adjust tab, or set exposure and white balance. For a straight conversion, leave everything as it is.

  3. Select every photo to convert

    Press Ctrl/Cmd+A to select all photos in the filmstrip, or Ctrl/Cmd-click to choose some.

  4. Export as JPEG

    Click Export, keep Size on Original, choose JPEG and a quality, and confirm. One photo downloads as a JPG; several download as one ZIP.

What a NEF file is

NEF (Nikon Electronic Format) is the RAW format of Nikon cameras: every Nikon DSLR and the whole Z mirrorless range save their RAW files as .nef, and some Coolpix compacts use the related .nrw. A NEF keeps the unprocessed sensor data, which is why it holds more detail in the highlights and shadows than a JPEG, but most websites, chat apps and print services don’t accept it and many system viewers can’t open it. Converting to JPG makes the photo easy to share.

Lightframes is a free, open-source photo editor that runs in your browser. It opens NEF and NRW files, develops them on your own device and exports full-resolution JPGs, without uploading anything and without installing software.

How NEF conversion works in the browser

The NEF is decoded on your device by LibRaw, an open-source RAW library compiled to WebAssembly:

  • Thumbnails come from the preview Nikon embeds in each NEF, so a folder of files appears quickly.
  • The export is developed from the full sensor data with the white balance the camera recorded, then encoded as JPEG at the quality you choose.
  • A fallback. If a file can’t be developed, for example a High Efficiency NEF or one from a camera newer than the bundled LibRaw, Lightframes exports the full-size JPEG Nikon stored inside the file instead.
  • The files stay in the tab. The files are never uploaded, and after the first visit editing works offline.

Lossless compressed, compressed and uncompressed NEF files all convert the same way.

Converting a whole card of NEF files

  1. Click Folder in the filmstrip and choose the folder that holds your NEF files (Chrome, Edge or Brave), or click Open and select them.
  2. Press Ctrl/Cmd+A to select all.
  3. If one edit should apply to all of them, edit one photo, copy it (Ctrl/Cmd+C) and paste it (Ctrl/Cmd+V) onto the selection. See the batch photo editor.
  4. Click Export, choose JPEG and confirm. You get one ZIP with a JPG for every NEF.

Each NEF is developed at full resolution one after another, so a large card takes a while. A computer handles big batches better than a phone.

Use Size Format and quality
Archive or print Original (up to 8192 px) JPEG, 95–100%
Email, web, client preview Web (2048 px) JPEG, 85–92%
Instagram feed IG 4:5 (1080 × 1350) or IG 1:1 JPEG, 92%
Smallest files Web (2048 px) WebP, 80–90%

To keep the original file names (such as DSC_0042), set the file name pattern to {name} instead of the default {name}-edited.

Limitations

  • Nikon-specific processing. Picture Controls, Active D-Lighting and other in-camera or Nikon software corrections are not applied.
  • Size cap. Exports are limited to 8192 px on the long edge, so files from 45 MP bodies are scaled down slightly at Original size.
  • Metadata. EXIF information (date, camera, lens, GPS) is not copied into the JPG.
  • Very new bodies and modes. Files the bundled LibRaw can’t read fall back to the embedded preview.

Canon and Sony files have their own pages: CR3 to JPG and ARW to JPG. Every other format is covered in the RAW to JPG converter, and to edit rather than just convert, see the RAW photo editor.

Questions

How do I convert a NEF to JPG for free?

Open the NEF in Lightframes at www.lightframes.si/editor, click Export, choose JPEG and confirm. The file is developed in your browser and saved as a full-resolution JPG, with no account, watermark or upload.

What is the difference between NEF and NRW?

Both are Nikon RAW formats. NEF is written by Nikon's interchangeable-lens cameras (DSLRs and Z mirrorless), NRW by some Coolpix compacts. Lightframes converts both the same way.

Can I batch convert NEF to JPG?

Yes. Open a folder or several files, select them all and export once. Every photo is developed with the same settings and the JPGs download together as a ZIP.

Are my NEF files uploaded?

No. Decoding, editing and JPEG encoding all happen in your browser on your own device. Your photos are not sent to a server.

Will the colours match my Nikon JPEGs?

Not exactly. Lightframes uses the camera's white balance and a neutral base rendering, but it doesn't apply Nikon Picture Controls, Active D-Lighting or in-camera lens corrections. Adjust the sliders or apply a preset before exporting to get the look you want.

What happens with High Efficiency NEF files?

Some recent Z cameras offer High Efficiency RAW, a compression the bundled decoder may not be able to read. If a file can't be developed, Lightframes exports the full-size JPEG preview Nikon stores inside the NEF instead of failing.

Updated

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