HDR to SDR
HDR is rendered to SDR using exposure and Reinhard tone mapping.
Convert HDR to BMP
- In your browser
- No upload
- Private by design
What happens when you convert HDR to BMP?
Transparency
The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
Encoding mode
BMP may be uncompressed or use a header-selected encoding. Alpha is header-dependent; 32 bits alone do not establish transparency support in the receiving application. The output uses the implemented still-image encoder; file size depends on the pixels and format.
HDR
Source
HDR
Radiance HDR / RGBE
Compression: LosslessTransparency: NoMetadata: Radiance header, EXPOSURE, FORMAT
Radiance pictures with a shared exponent for high-dynamic-range lighting values.
Explore HDR format →BMP
Target
BMP
Windows Bitmap
Compression: Depends on variantTransparency: YesMetadata: DIB header, ICC (V5)
Windows raster storage with several DIB header versions. Simple uncompressed pixels are common, but alpha and compression vary.
Explore BMP format →Is HDR → BMP right for you?
Good choice when
- BMP fits your delivery use: Windows bitmap interchange.
- You need an SDR delivery copy and can review its tone mapping.
- Your receiving application supports the required BMP variant.
- You can validate the destination’s sample precision and colour interpretation.
- You need a BMP-compatible workflow that can hold transparency added in a separate edit.
Probably not when
- You need the original HDR range for relighting or grading.
- You need a guaranteed output file size or archival pixel equality. Encoder settings do not guarantee either.
- You require identical samples without a defined colour and precision policy.
- You expect automatic background removal or transparency.
HDR to BMP conversion details
- HDR to SDR
- HDR is rendered to SDR using exposure and Reinhard tone mapping.
- Transparency
- The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
- Encoding mode
- BMP may be uncompressed or use a header-selected encoding. Alpha is header-dependent; 32 bits alone do not establish transparency support in the receiving application. The output uses the implemented still-image encoder; file size depends on the pixels and format.
- Sample precision & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Metadata & colour
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
- Compression
- HDR: Lossless → BMP: Depends on variant HDR: RLE preserves stored RGBE bytes; RGBE quantization is not exact storage of arbitrary float RGB. The .hdr format is distinct from the general concept of HDR photography. BMP: BMP may be uncompressed or use a header-selected encoding. Alpha is header-dependent; 32 bits alone do not establish transparency support in the receiving application.
- Transparency
- Transparency is replaced with white by default. Change the background in Advanced options.
- Colour depth
- HDR: 32-bit RGBE / XYZE pixel → BMP: 1 / 4 / 8 / 16 / 24 / 32 bpp
- HDR
- HDR: Radiometric values
- Dimensions
- Rendered image dimensions are retained within the converter limits; this tool does not offer resizing. Orientation handling depends on the source decoder.
- Metadata
- Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Common questions
How will HDR brightness be mapped?
HDR is rendered to SDR using exposure and Reinhard tone mapping.
Will the background become transparent?
The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
Which compression mode will BMP use?
BMP may be uncompressed or use a header-selected encoding. Alpha is header-dependent; 32 bits alone do not establish transparency support in the receiving application. The output uses the implemented still-image encoder; file size depends on the pixels and format.
Are bit depth and colour values guaranteed to match?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Will metadata and colour profiles be retained?
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.