Add your HDR file
Drop one or more .hdr files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
HDR to BMP
Converting a .hdr image to .bmp re-encodes the pixels for a different balance of size, quality, and support. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop HDR files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Radiance HDR image to Bitmap image
Converting a .hdr image to .bmp re-encodes the pixels for a different balance of size, quality, and support. An .hdr file is a Radiance RGBE image, the original high-dynamic-range raster format. Each pixel stores three 8-bit mantissas and one shared 8-bit exponent, so 32 bits per pixel cover a luminance range no ordinary 8-bit format can express. It is still the everyday container for the HDRI environment maps used to light 3D scenes.
A .bmp file is the Windows bitmap format: raw pixel rows written to disk with a small header and, in the common case, no compression at all. Its brute simplicity makes .bmp trivial to read and write from any programming language, which is why it persists in tooling, embedded systems, and quick debugging dumps. For this route the practical draw is dead-simple structure with no decoding step at all and exactly lossless — what you write is what you read — balanced against no effective compression, so files dwarf PNG equivalents of the same image, which is worth knowing before you commit a large batch.
Why convert HDR to BMP?
The practical trigger for this conversion is usually a mismatch: with .hdr, only about 1 percent precision per channel, and the shared exponent hurts saturated colours. Switching to .bmp buys you dead-simple structure with no decoding step at all, which is why it is the better fit for quick lossless dumps from code, since a writer takes minutes to implement. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
HDR vs BMP at a glance
| Aspect | Radiance HDR image (.hdr) | Bitmap image (.bmp) |
|---|---|---|
| Format type | Lossy — discards detail it judges invisible to shrink files | Lossless — every pixel or sample is preserved exactly |
| How it stores data | rGBE encoding: three 8-bit mantissas plus one shared 8-bit exponent, 32 bits per pixel | pixels are typically stored uncompressed; optional RLE encoding exists only for 4-bit and 8-bit palette images |
| Strongest at | hDRI environment maps and sky domes for image-based lighting in Blender, Unreal, Unity and V-Ray | quick lossless dumps from code, since a writer takes minutes to implement |
| Weak spot | only about 1 percent precision per channel, and the shared exponent hurts saturated colours | no effective compression, so files dwarf PNG equivalents of the same image |
Pick BMP as the output
Select .bmp in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if BMP is selectable, the route is real and validated.
Convert on your device
Press Convert. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid BMP file. Outputs keep the original filename with the .bmp extension.
HDR to BMP questions, answered
Will converting HDR to BMP lose quality?
No new loss is introduced — since hdr is lossy-oriented and bmp is lossless-oriented, everything the .hdr file still contains is carried over exactly. What was already discarded by the original lossy encode cannot be recovered, though; converting to .bmp does not "restore" quality.
Is it private to convert HDR files here?
Yes — the .hdr file is processed inside your browser tab and never uploaded. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders. Close the tab and the file is gone from memory.
Where will the BMP file work?
Windows treats BMP as a native citizen, and macOS, Linux, and all major browsers open it without complaint. The format's problem is never support but waste: emailing or hosting uncompressed bitmaps burns bandwidth for zero benefit, so converting to PNG is almost always an upgrade.
Will the BMP file be bigger or smaller than my HDR?
Larger, sometimes much larger. A lossless .bmp must store every pixel or sample the decoder produced, without the perceptual shortcuts .hdr used. Use this route for editing headroom, not for saving space.
What happens to the metadata in my HDR file?
In .hdr, the text header carries EXPOSURE, GAMMA, PRIMARIES, SOFTWARE and free-form comment lines. There is no EXIF, XMP or ICC profile block, and this converter's raster outputs do not carry the header lines across. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.