100% Free No Upload Bulk Conversion

Bulk DIB to HDR Converter — Free, Unlimited

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

DIB HDR · ZIP

Bulk DIB → HDR Converter

Select files, convert, download ZIP — all locally

Drop DIB files here or click to browse

Supports batch selection — convert hundreds of files

DIB → HDR ZIP

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Converting 0 / 0

✓ Conversion completed! All files converted successfully. Click Download ZIP to save them.

Why convert DIB to HDR?

Because DIB files use uncompressed compression and 24-bit, they are not ideal for High dynamic range photography. Converting them to HDR (lossless, 32-bit float) 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. This kind of format decision tends to matter more as a project scales up.

Technical comparison: DIB vs HDR

Property	DIB	HDR
Full name	Device Independent Bitmap	High Dynamic Range Image
Compression	Uncompressed	Lossless
Color depth	24-bit	32-bit float
Transparency	No	No
Web support	No	No
Developed by	Microsoft (1990)	Radiance / Greg Ward (1989)
Max colors	16.7M	floating point
MIME type	`image/bmp`	`image/vnd.radiance`
Category	Raster image	Raster image
Year gap	1 years apart in technical development
Best for	Windows system graphics	High dynamic range photography
Estimated size change	Typically 50%-75% smaller

How to use — 3 simple steps

Select your DIB files

Drag & drop or click to choose multiple DIB images. No file size restrictions.

Start the conversion

Click "Convert to :to" — your files are processed locally using WebAssembly. No upload, no waiting.

Download ZIP archive

All converted HDR files are bundled into a single ZIP. One click, everything saved.

Popular use cases for DIB → HDR

Game modders converting DIB textures to HDR for engine compatibility

3D artists converting DIB reference images to HDR for their pipeline

YouTubers converting DIB thumbnails to HDR for upload requirements

Podcasters converting DIB cover art to HDR for platform specifications

💡 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

The current version processes the batch in one continuous run; for very large batches, splitting into smaller groups is recommended.

Yes, you can drag a folder or multiple DIB files directly onto the drop zone.

Yes, once the page and its WebAssembly modules are loaded, conversion works without an active internet connection.

HDR is well suited for archival when its compression matches your quality needs — lossless HDR is ideal for long-term storage.

Bulk DIB to HDR Converter — Free, Unlimited

Why convert DIB to HDR?

Technical comparison: DIB vs HDR

How to use — 3 simple steps

Popular use cases for DIB → HDR

💡 Pro tips

Frequently Asked Questions

Can I pause and resume a large DIB to HDR batch?

Does the tool support drag-and-drop for DIB files?

Will converting DIB to HDR work offline after the page loads?

Can I trust HDR for long-term archival of my DIB images?

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