100% Free No Upload Bulk Conversion

Bulk HDR to ARW Converter — Free, Unlimited

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

HDR ARW  ·  ZIP
Bulk HDR → ARW Converter
Select files, convert, download ZIP — all locally
HDR Support is coming soon — we are working on it.

Drop HDR files here or click to browse

Supports batch selection — convert hundreds of files

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

Why convert HDR to ARW?

People often ask why bother converting HDR at all. The short answer: ARW handles Sony Alpha mirrorless photography noticeably better. This conversion processes your files entirely in your browser using WebAssembly – no upload, no server, no privacy concerns. Perfect for sensitive or large batches. The conversion itself takes seconds — the benefits last much longer.

Technical comparison: HDR vs ARW

PropertyHDRARW
Full nameHigh Dynamic Range ImageSony Alpha RAW
Compression Lossless Lossless RAW
Color depth32-bit float14-bit per channel
Transparency No No
Web support No No
Developed byRadiance / Greg Ward (1989)Sony (2006)
Max colorsfloating point4.4T
MIME typeimage/vnd.radianceimage/x-sony-arw
Category Raster image RAW format
Year gap 17 years apart in technical development
Best for High dynamic range photography Sony Alpha mirrorless photography

How to use — 3 simple steps

1
Select your HDR files
Drag & drop or click to choose multiple HDR 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 HDR → ARW

Archivists converting legacy HDR scans into the more durable ARW format

Researchers standardizing a dataset of HDR images into ARW for consistency

Museums digitizing collections from HDR into ARW for public archives

Video editors extracting HDR frames and converting them to ARW for reference

💡 Pro tips

  • 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

Yes — ARW at 14-bit per channel preserves color fidelity well; lossless mode preserves it exactly.
Speed depends more on file size than source format. Typical HDR files convert in one to two seconds each.
You can select multiple files at once from your file picker (Ctrl/Cmd+click or Shift+click) before starting the conversion.
No. ARW is a stable, widely adopted format, so files you convert today remain valid indefinitely.
Application offline!