OpenAnyFile
What is a .mrw file?
Minolta RAW is a camera RAW format developed by Konica Minolta, first released in 2003. It is usually created by Minolta DiMAGE and Dynax cameras.
Not TIFF-based: a Minolta block structure whose embedded TIFF section holds the preview.
File details
| Full name | Minolta RAW |
|---|---|
| Category | Camera RAW |
| MIME type | image/x-minolta-mrw |
| Signature (magic bytes) | 00 4D 52 4D (MRM) |
| Developer | Konica Minolta |
| Introduced | 2003 |
| Opens with | RAW preview extractor |
| Uploaded? | No — read locally in your browser |
How to open a .mrw file
OpenAnyFile routes .mrw files to its RAW preview extractor, which shows the full-size preview the camera embedded in the file.
- Drop your .mrw file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the RAW preview extractor.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the full-size preview the camera embedded in the file. Size, type, signature and checksums are always shown.
Does not work
Editing layers or the raw data. You see the preview image stored in the file, not an editable document.
Is it safe to open a .mrw file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .mrw files
Can I open a .mrw file without installing software?
Yes. OpenAnyFile opens .mrw files in your browser using its RAW preview extractor. You get the full-size preview the camera embedded in the file, with nothing installed and no account.
How do I know a file is really a .mrw file?
Check its first bytes instead of its name. A genuine MRW file begins with 00 4D 52 4D (MRM). OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .mrw file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.