Camera RAW
What is an MRW file?
Updated Jul 2026
MRW (Minolta RAW) is the raw image format used by Minolta and early Konica Minolta digital cameras. It stores the unprocessed data straight off the sensor, so nothing is lost to compression, along with the shot's metadata. The catch is that almost no modern software opens it directly anymore, since Minolta's camera line ended years ago.
- Extension
- .mrw
- Type
- Camera RAW
- Typically
- Minolta cameras
- Metadata
- Carries EXIF
Why MRW exists
Minolta introduced MRW for its DiMAGE and early digital SLR cameras in the early 2000s, before Konica Minolta's camera division was sold to Sony in 2006. Each MRW file holds the raw sensor readout plus a separate block of metadata like exposure, white balance, and lens data, which is what let photographers fine-tune a shot after the fact instead of settling for whatever the camera baked in.
Because it's raw, an MRW file needs to be processed before it looks like a normal photo. The camera didn't apply sharpening, color correction, or compression, so the data is closer to a photographic negative than a finished picture. That's great for control, but it means the file is only useful if something on the other end knows how to read it.
People run into MRW files today mostly while digging through an old memory card or archive from a Minolta camera. The format was tied to hardware that stopped being made almost two decades ago, so current photo apps, phones, and web tools generally don't recognize it, which forces a conversion to something like JPG or TIFF just to view the shot.
The trade-offs
Strengths
- Captures full sensor detail with no lossy compression
- Keeps exposure and color data editable after the shot
- Stores metadata about the camera settings used
Watch-outs
- Tied to discontinued Minolta camera hardware
- Very little current software opens it natively
- Large file size compared to a processed JPG
- Needs specialized raw processing before it's usable
A note on privacy
An MRW file carries EXIF-style metadata, including camera settings and sometimes the date and location a photo was taken. Uploading it to a web-based converter to make it viewable sends that data to someone else's server along with the image. Converting it on your own computer keeps the raw file, the finished photo, and that metadata on your machine the whole time.
Questions
How do I open an MRW file?
Modern photo software rarely reads MRW directly, since it was built for Minolta cameras that are no longer made. The practical route is converting it to a common format like JPG or TIFF so it opens anywhere.
Is MRW better than JPG?
MRW keeps far more image data since nothing is compressed or processed in-camera, which matters for editing. JPG is smaller and opens everywhere, but it's a finished, compressed version with less to work with if you want to adjust exposure or color later.
Why does my old Minolta camera save photos as MRW?
Minolta's raw shooting mode saved the sensor's unprocessed data as MRW so photographers could adjust exposure and color afterward instead of relying on the camera's built-in processing.
Can I convert MRW without uploading it?
Yes. A desktop app like Morphjet converts MRW files on your own computer, so the raw image and any embedded camera metadata never leave your machine.
Will I lose quality converting MRW to JPG?
Some, since JPG uses lossy compression and MRW doesn't. Converting to TIFF instead keeps the image lossless if you need to preserve the original detail.
Morphjet opens and converts MRW and 1,800+ other formats, all on your own computer. Launching this July.