100% Free No Upload Bulk Conversion RAW Support

Bulk NEF to ARW Converter — Free, No Upload

Convert multiple NEF files to ARW instantly — all in your browser. No file limits, no watermarks, and completely private.

NEF ARW  ·  ZIP
Bulk NEF → ARW Converter
Select files, convert, download ZIP — all locally
RAW conversion may take longer — files are processed via WebAssembly in your browser

Drop NEF files here or click to browse

Supports batch selection — convert hundreds of files

NEF → ARW ZIP
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Converting 0 / 0
✓ Conversion completed! All files converted successfully. Click Download ZIP to save them.

Why convert NEF to ARW?

Because NEF files use lossless RAW compression and 14-bit per channel, they are not ideal for Sony Alpha mirrorless photography. Converting them to ARW (lossless RAW, 14-bit per channel) solves this. This conversion processes your files entirely in your browser using WebAssembly – no upload, no server, no privacy concerns. Perfect for sensitive or large batches.

RAW conversion may take longer — files are processed via WebAssembly in your browser

Technical comparison: NEF vs ARW

PropertyNEFARW
Full nameNikon Electronic FormatSony Alpha RAW
Compression Lossless RAW Lossless RAW
Color depth14-bit per channel14-bit per channel
Transparency No No
Web support No No
Developed byNikon (2003)Sony (2006)
Best for Nikon DSLR professional photography Sony Alpha mirrorless photography

How to use — 3 simple steps

1
Select your NEF files
Drag & drop or click to choose multiple NEF images. No file size restrictions.
2
Start the conversion
Click "Convert to :to" — your files are processed locally using WebAssembly. No upload, no waiting.
3
Download ZIP archive
All converted ARW files are bundled into a single ZIP. One click, everything saved.

Popular use cases for NEF → ARW

Uploading NEF photos to social media after converting to ARW

Saving hard drive space by converting a batch of NEF images to ARW

Emailing high-quality images without attachment limits (use ARW)

Creating a backup copy of your NEF library in the more compatible ARW format

💡 Pro tips

  • RAW files process directly in your browser — no software installation needed
  • Bulk convert your entire RAW session at once — drop all files together
  • Use the ZIP download to get all converted files in a single click
  • All processing is private — files are never uploaded to any server

Frequently Asked Questions

Typically 60-90% smaller for lossy ARW, or 20-40% for lossless ARW compared to uncompressed NEF.
ARW is supported by all modern browsers (Chrome, Firefox, Safari, Edge) if web_support is true. Check caniuse.com otherwise.
Only the first frame of animated GIF will be converted to ARW. For animation, use GIF or WebP.
ARW supports transparency? If yes, preserved. If not, transparent areas become white/black. Use PNG for transparency.
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