Convert ARW to BMP Online
Sony's lossy compressed RAW option (enabled by default on some models) subtly reduces editing latitude versus truly uncompressed RAW. Converting to BMP gives you a key advantage: zero processing overhead — raw pixel data can be read directly into memory without a decompression step. BMP is best for uncompressed pixel data for windows system graphics and legacy applications requiring raw bitmap access.
Why Convert ARW to BMP?
Sony's lossy compressed RAW option (enabled by default on some models) subtly reduces editing latitude versus truly uncompressed RAW — converting to BMP overcomes this by providing zero processing overhead — raw pixel data can be read directly into memory without a decompression step
BMP is the right choice when you need to: intermediate format for image processing pipelines that need raw pixel access
Gain broader compatibility — BMP works with Windows (native), macOS, Linux, all image editors; rarely used on the web
Your ARW files were created for recovering shadow detail in high-dynamic-range sony landscape shots, but now you need a format suited to different workflows
ARW vs BMP — Format Comparison
Sony Alpha Raw (.arw)
Windows Bitmap (.bmp)
How to Convert ARW to BMP
Upload your ARW file
Drag your .arw file onto the upload area or click to browse. We accept ARW files up to 200 MB.
Choose BMP as output format
Select .bmp (Windows Bitmap) from the format list. BMP uses lossless encoding, so your output quality matches the source.
Convert and download
Click Convert and wait for processing. Your BMP file will be ready to download in seconds. The result is optimized for uncompressed pixel data for windows system graphics and legacy applications requiring raw bitmap access.
Frequently Asked Questions
Is the ARW to BMP conversion lossless?
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When both formats support lossless data, the conversion preserves all content. Uncompressed pixel-perfect quality; supports 1-bit through 32-bit color depth.
How large will my BMP file be compared to the original ARW?
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ARW files are typically 25 MB – 60 MB, while BMP files are typically 1 MB – 100 MB. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted BMP file?
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BMP is compatible with: Windows (native), macOS, Linux, all image editors; rarely used on the web.
What is the maximum file size I can convert?
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PureConverter accepts ARW files up to 200 MB. Your files are processed securely and deleted from our servers after conversion.
What's the difference between ARW and BMP?
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ARW (Sony Alpha Raw) is best for editing sony mirrorless and dslr photos with full sensor data and sony color science. BMP (Windows Bitmap) is best for uncompressed pixel data for windows system graphics and legacy applications requiring raw bitmap access. Key tradeoff: ARW's advantage is captures sony's acclaimed low-light sensor data with excellent high-iso performance and 14-bit depth, while BMP's advantage is zero processing overhead — raw pixel data can be read directly into memory without a decompression step.
Pro Tips for ARW to BMP Conversion
BMP preserves full quality, so your output file will be as good as the ARW source — no need to worry about compression artifacts
If your ARW file has transparency, make sure BMP supports it — BMP supports transparency
BMP works especially well for: screen capture output from older windows tools and apis
Did you know? BMP files store pixel rows bottom-to-top by default (origin at bottom-left), a convention inherited from OS/2 that confused generations of graphics programmers.
Ready to Convert?
Upload your ARW file above and get your BMP in seconds. Free, fast, and secure.