100% Free No Upload Bulk Conversion RAW Support

Bulk ARW to HDR Converter — Free, Unlimited

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

ARW HDR  ·  ZIP
Bulk ARW → HDR Converter
Select files, convert, download ZIP — all locally
RAW conversion may take longer — files are processed via WebAssembly in your browser
Browsers cannot reliably generate a real HDR file. The downloaded file may not actually be a valid HDR.

Drop ARW files here or click to browse

Supports batch selection — convert hundreds of files

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

Why convert ARW to HDR?

Because ARW files use lossless RAW compression and 14-bit per channel, they are not ideal for High dynamic range photography. Converting them to HDR (lossless, 32-bit float) solves this. Converting ARW to HDR extracts the small JPEG preview the camera embedded in the RAW file — it does not perform a full RAW decode (demosaicing, white balance, tone mapping) on the sensor data. The result is a quick, preview-quality image; for full-resolution processing, use dedicated RAW software like Adobe Camera Raw or Lightroom. In short, this is less about one format being 'better' and more about matching the tool to the job.

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

Technical comparison: ARW vs HDR

PropertyARWHDR
Full nameSony Alpha RAWHigh Dynamic Range Image
Compression Lossless RAW Lossless
Color depth14-bit per channel32-bit float
Transparency No No
Web support No No
Developed bySony (2006)Radiance / Greg Ward (1989)
Max colors4.4Tfloating point
MIME typeimage/x-sony-arwimage/vnd.radiance
Category RAW format Raster image
Year gap 17 years apart in technical development
Best for Sony Alpha mirrorless photography High dynamic range photography
Estimated size change Typically 40%-70% smaller

How to use — 3 simple steps

1
Select your ARW files
Drag & drop or click to choose multiple ARW 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 HDR files are bundled into a single ZIP. One click, everything saved.

Popular use cases for ARW → HDR

UI/UX designers exporting ARW mockups as HDR for developer handoff

Print shops converting customer-submitted ARW files to HDR for their workflow

Teachers converting ARW class materials to HDR for easier sharing

Nonprofit organizations converting ARW donor photos to HDR for annual reports

💡 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

HDR uses lossless compression. If lossy, at 85-92% quality the loss is imperceptible. If lossless, every pixel is preserved.
No artificial limit. Browser memory is the only constraint. Files up to 500 MB work well.
Yes. The bulk converter processes all selected files sequentially. Hundreds of files possible.
Yes. Everything happens locally in your browser via WebAssembly. Files never uploaded.
Application offline!