100% Free No Upload Bulk Conversion

Bulk BMP to HDR Converter — Free, Unlimited

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

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

Drop BMP files here or click to browse

Supports batch selection — convert hundreds of files

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

Why convert BMP to HDR?

HDR isn't automatically 'better' than BMP in every case – but for High dynamic range photography, it's the clearer choice. This conversion processes your files entirely in your browser using WebAssembly – no upload, no server, no privacy concerns. Perfect for sensitive or large batches. It's a small technical decision that quietly saves time down the line.

Technical comparison: BMP vs HDR

PropertyBMPHDR
Full nameBitmap Image FileHigh Dynamic Range Image
Compression Uncompressed Lossless
Color depth24-bit32-bit float
Transparency No No
Web support No No
Developed byMicrosoft (1988)Radiance / Greg Ward (1989)
Max colors16.7Mfloating point
MIME typeimage/bmpimage/vnd.radiance
Category Raster image Raster image
Year gap 1 years apart in technical development
Best for Uncompressed images on Windows High dynamic range photography
Estimated size change Typically 50%-75% smaller

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

Popular use cases for BMP → HDR

App developers bundling HDR assets instead of heavier BMP files

Reducing CDN bandwidth bills by serving HDR instead of BMP

Preparing HDR versions of BMP icons for cross-platform apps

Quickly converting a single BMP screenshot to HDR for a bug report

💡 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

You can always convert the HDR file back to BMP later, though lossless conversions may not be perfectly lossless in both directions.
HDR was designed for High dynamic range photography, which is a common need for people working with BMP source files.
No signup, no login, no email required. Just open the page and start converting.
Yes. Since processing is local to your browser, no files leave your device, which makes it safe for most workplace and school policies.
Application offline!