Convert MRW to BMP — Free Online Converter
Convert Minolta Raw (.mrw) to Bitmap Image (.bmp) online for free. Fast, secure image conversion with no watermarks or registration....
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Upload your .mrw file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .bmp file when it's ready.
About MRW to BMP Conversion
MRW is the proprietary RAW image format used by Konica Minolta digital SLR cameras, primarily the Maxxum 7D (Dynax 7D outside North America) and Maxxum 5D, as well as the earlier Minolta DiMAGE A-series compacts (A1, A2, A200). These cameras, produced between 2001 and 2006, captured 6-megapixel CCD sensor data in MRW files with 12-bit depth. Konica Minolta exited the camera market in 2006, transferring its camera technology to Sony, which launched the Alpha mount system.
Converting MRW to BMP produces an uncompressed Windows bitmap where every demosaiced pixel is stored as raw RGB data. BMP's universal compatibility ensures these files from a discontinued camera system remain accessible on any computer, even decades after Konica Minolta stopped producing cameras and supporting their proprietary format.
Why Convert MRW to BMP?
Konica Minolta has not updated MRW format support since leaving the camera market in 2006. Mainstream photo software is gradually dropping MRW support — Adobe has maintained limited compatibility, but many newer applications and operating systems cannot read MRW files natively. Converting to BMP ensures long-term accessibility of these legacy photographs.
BMP's uncompressed format is required by certain industrial, scientific, and legacy systems. While this is a niche use case for Konica Minolta photographs, the guaranteed compatibility of BMP makes it the safest format for any system that needs to read the converted images without depending on format-specific decoders.
Common Use Cases
- Preserve Konica Minolta Maxxum/Dynax photographs by converting to universally readable BMP format
- Rescue legacy DiMAGE A1/A2 RAW files from the unsupported MRW format before software compatibility is lost
- Feed Konica Minolta camera output into legacy systems requiring uncompressed BMP input
- Create uncompressed reference copies of MRW files for pixel-level archival inspection
- Convert discontinued Minolta RAW files for scientific or forensic analysis tools requiring BMP
How It Works
The conversion reads the MRW file's proprietary container, which uses a Minolta-specific header structure (MRM tag) followed by a series of data blocks including the Bayer pattern sensor data, camera metadata, and thumbnail preview. LibRaw (via Sharp) interprets the 12-bit CCD sensor data, applies white balance multipliers and color matrix coefficients stored in the MRW header, and performs demosaicing. The output is written as a 24-bit Windows BMP. Given the 6 MP resolution of Maxxum/Dynax cameras, BMP files are a modest 18 MB each.
Quality & Performance
BMP applies zero compression, so no artifacts are introduced during the format conversion. The demosaiced output faithfully represents the Konica Minolta CCD sensor data at 8 bits per channel. The 12-bit RAW depth is reduced to 8-bit BMP, losing some shadow and highlight recovery range. The 6 MP sensor resolution is fully preserved. Despite being from a discontinued camera system, the CCD sensor data produces clean, pleasing color rendition that many photographers still appreciate.
Device Compatibility
| Device | MRW | BMP |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Tips for Best Results
- 1Convert MRW files sooner rather than later — software support for this discontinued format is declining
- 2For general archival, PNG is more practical than BMP — lossless quality at 3-5x smaller file sizes
- 3The 6 MP resolution produces modest BMP files (18 MB) that are easy to store and transfer
- 4Back up original MRW files before conversion — they contain the full 12-bit sensor data
- 5Consider batch converting your entire Konica Minolta photo collection to future-proof the archive
MRW to BMP conversion rescues Konica Minolta photographs from an unsupported proprietary format into a universally compatible uncompressed bitmap. The modest 6 MP resolution produces manageable BMP files.