100% Free No Upload Bulk Conversion

Bulk BMP to ARW Converter — Free, Unlimited

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

BMP ARW  ·  ZIP
Bulk BMP → ARW Converter
Select files, convert, download ZIP — all locally

Drop BMP files here or click to browse

Supports batch selection — convert hundreds of files

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

Why convert BMP to ARW?

Because BMP files use uncompressed compression and 24-bit, 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. In short, this is less about one format being 'better' and more about matching the tool to the job.

Technical comparison: BMP vs ARW

PropertyBMPARW
Full nameBitmap Image FileSony Alpha RAW
Compression Uncompressed Lossless RAW
Color depth24-bit14-bit per channel
Transparency No No
Web support No No
Developed byMicrosoft (1988)Sony (2006)
Max colors16.7M4.4T
MIME typeimage/bmpimage/x-sony-arw
Category Raster image RAW format
Year gap 18 years apart in technical development
Best for Uncompressed images on Windows Sony Alpha mirrorless photography

How to use — 3 simple steps

1
Select your BMP files
Drag & drop or click to choose multiple BMP images. No file size restrictions.
2
Start the conversion
Click "Convert to :to" — your files are processed locally using Canvas API. 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 BMP → ARW

Marketing teams standardizing campaign assets from BMP to ARW

Converting BMP product photography to ARW for a faster-loading storefront

Bloggers converting BMP images to ARW before uploading to a CMS

Newsletter designers converting BMP graphics to ARW for smaller email sizes

💡 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

Typically 60-90% smaller for lossy ARW, or 20-40% for lossless ARW compared to uncompressed BMP.
ARW has limited native browser support, so it's best used for storage/processing rather than direct web display. Check caniuse.com for the latest status.
BMP is not an animation format, so this conversion always processes static images — no animation handling needed.
No — ARW does not support transparency, so transparent areas are filled with a solid white background.

Related conversions

JPEG → JPE
JPEG → PNG
JPEG → WEBP
JPEG → GIF
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