MRW Converter

How to Convert MRW to Any Format

1. Upload Your MRW File: Drag and drop your Minolta RAW photos or click "Add Files". Batch is supported — drop in a whole card's worth of .mrw files and each one converts in parallel, then download them together as a ZIP.
2. Pick an Output Format and Quality Preset: Choose the target — JPG, PNG, TIFF, WebP, AVIF, HEIC, BMP, PPM, GIF, or PDF. The default Quality Preset is "Very High (Recommended)"; drop it to High, Medium, or Low to trade detail for a smaller file, or switch to Specific file size to cap output at an exact MB target. For a TIFF or PNG that keeps every edit, set Lossless to "Yes".
3. Resize, Set Bit Depth, or Choose DPI (Optional): Under Image resolution, keep original, pick a Preset Resolution (8K / 4K / 1440p / 1080p / 768p / 720p / 480p / 360p), scale by percentage, or enter a custom Width × Height with aspect ratio locked. For a TIFF or PNG archive, set Bit Depth to 16-bit to hold the wide tonal range of the RAW capture; for print or PDF output, raise the DPI (300 for print, 600 for archival).
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Popular MRW Conversions

• MRW to JPG — the universal share-and-print format, small and openable everywhere
• MRW to PNG — lossless export for editing, graphics, and re-saving without loss
• MRW to TIFF — full-bit-depth master for print labs and archives
• MRW to WebP — modern web format, smaller than JPG at equal quality
• MRW to BMP — uncompressed pixels for pipelines that need them
• MRW to PDF — wrap one or many photos into a single shareable document

Why Convert an MRW File?

MRW (Minolta RAW) is the proprietary RAW format Minolta introduced around 2001, starting with the DiMAGE 5 and DiMAGE 7, and carried through the DiMAGE A1, A2, and A200 and the Dynax/Maxxum 5D and 7D DSLRs. It stores the unprocessed signal straight off the camera's CCD sensor — typically 8, 10, or 12 bits per pixel in the sensor's Bayer color-filter layout — alongside the Exif and MakerNote metadata. That linear sensor data is what gives RAW its editing latitude: you can recover highlights, lift shadows, and reset white balance after the fact in a way a baked JPEG never allows. The catch is that almost nothing outside dedicated photo software can display an MRW, and the line went dormant after Sony acquired Minolta's camera business in 2006 and moved the Alpha system to its own ARW format. Converting turns that editing master into a file the rest of the world can actually open. Common reasons people convert an MRW:

• Sharing, uploading, or printing (JPG) — An MRW won't upload to most websites, attach to email cleanly, or open in a basic image viewer. Converting MRW to JPG bakes in the current exposure and white balance and produces a small file that opens on every phone, browser, and print kiosk. This is the most common conversion by far.
• Editing in apps that don't read Minolta RAW (PNG / TIFF) — Many editors and document workflows can't import an MRW directly, and because Minolta is long gone, RAW support for these older files is thinning over time. Exporting to a lossless PNG or 16-bit TIFF hands those apps a full-quality, fully-rendered image with no proprietary decoding required.
• Long-term archiving (TIFF) — Because MRW is a proprietary, discontinued format, archivists worry that future software could drop support for it. A 16-bit TIFF is a stable, openly-documented master that any imaging program will read decades from now, while preserving the wide tonal range of the original capture.
• Modern web delivery (WebP / AVIF) — For a gallery or portfolio, WebP and AVIF deliver the same visible quality as JPG at a meaningfully smaller size, which speeds up page loads. Both are supported in current Chrome, Firefox, Edge, and Safari.
• Contact sheets and proofs (PDF) — Wrapping a set of converted photos into a single PDF makes a clean proof sheet or client deliverable that opens anywhere without a gallery app. See MRW to PDF for the multi-image flow.

What "Converting RAW" Actually Does

An MRW is not a finished picture — it's the sensor's measurements plus metadata. (Despite the name, the file isn't TIFF-based; it carries a small block with a TIFF-6.0-style header for the Exif and MakerNote tags, but the image payload is Minolta's own RAW data.) When you open it, software demosaics it: it reconstructs full color from the camera's Bayer grid, then applies white balance, a tone curve, and color rendering to produce a viewable image. Converting an MRW to JPG, PNG, or TIFF runs exactly that pipeline on our servers and writes out the rendered result. That's why the conversion is one-directional in practice: a JPG or TIFF made from an MRW is a developed photo, and you can't reconstruct the original RAW latitude from it afterward — keep your MRW originals.

Two choices control how much of the RAW's quality survives. Bit depth decides tonal range: an 8-bit JPG holds 256 levels per channel, while a 16-bit TIFF or PNG preserves the smooth gradients of the 12-bit capture, which matters if you'll edit further. Compression decides file size: JPG and WebP are lossy (smaller, fine for delivery), while PNG and TIFF can be lossless (larger, ideal as a master). Pick lossy 8-bit for sharing, lossless 16-bit for archiving and re-editing.

Output Format Comparison

MRW vs ARW vs DNG

If your camera is an early-2000s Minolta or Konica Minolta body, your files are almost certainly .mrw. If they came from a Sony Alpha (the line Sony built on Minolta's mount after 2006), they'll be .arw instead — a different format that needs its own converter.

Frequently Asked Questions

What program opens an MRW file?

Dedicated photo software with RAW support — Adobe Photoshop and Lightroom, RawTherapee, XnView/XnViewMP, IrfanView (with its RAW plug-in), and Apple Photos — can open and develop an MRW. Most basic image viewers, web browsers, and email clients cannot, and because Minolta is long discontinued, RAW support for these files isn't guaranteed in newer software. Converting to JPG or PNG sidesteps all of that by turning the MRW into a standard image any program can display.

Does converting MRW to JPG lose quality?

Some, but it's controllable. An MRW holds more tonal data than an 8-bit JPG can store, so the conversion bakes in the current exposure and white balance and discards the editing latitude you'd keep in RAW — that part is unavoidable when you leave RAW. The visible quality depends on the Quality Preset: "Very High (Recommended)" produces a JPG that's hard to tell from the rendered RAW on screen, while lower presets trade detail for a smaller file. Keep your original .mrw files; the JPG is a developed deliverable, not a replacement for the master.

Should I convert MRW to TIFF or PNG to keep full quality?

Both are lossless, so pick by tonal depth and use. Choose a 16-bit TIFF when you want a print-ready or archival master that preserves the wide tonal range of the 12-bit capture for further retouching — set Lossless to "Yes" and Bit Depth to 16-bit. Choose PNG when you need the image for graphics work, transparency, or an editor that reads PNG but not TIFF. PNG is most widely handled at 8-bit, so for serious re-editing of highlights and shadows, TIFF is the safer master.

Is MRW the same as Sony's ARW format?

No. MRW is Minolta's (later Konica Minolta's) RAW format from its early-2000s DiMAGE and Dynax/Maxxum cameras. When Sony acquired Minolta's camera business in 2006 and launched the Alpha system on the same lens mount, it introduced its own RAW format, ARW, rather than continuing MRW. They're separate formats with different internals, so an MRW tool and an ARW tool aren't interchangeable — check whether your files end in .mrw or .arw.

What does the MRW file actually contain?

The unprocessed signal from the camera's CCD sensor — typically 8, 10, or 12 bits per pixel arranged in the sensor's Bayer color-filter pattern — plus a metadata block holding the Exif and Minolta MakerNote tags. It is not a finished, viewable picture; software has to demosaic and develop it first. That raw sensor data is exactly what gives the file its editing latitude, and exactly why a plain image viewer can't show it without RAW decoding.

Can I batch-convert a whole folder of MRW files at once?

Yes. Drop in as many .mrw files as you like and each converts in parallel with the same output format and settings, then you download them as one ZIP. This is the typical workflow for clearing an old Minolta card — convert all the keepers to JPG in one pass while keeping the RAW originals on your drive. There's no fixed file-count cap; the practical limit is how long the upload of many RAW files takes on your connection.

What's the largest MRW file I can convert?

There's no fixed per-file cap. Conversion runs on our servers, so the practical limit is your upload size and connection speed. MRW files from these cameras are usually well under 20 MB, so they convert quickly — in our testing, a 12 MB MRW from a DiMAGE-series body converted to a roughly 3-4 MB JPG at the "Very High" preset, openable anywhere. Batch jobs have no quantity limit; queue them and grab the ZIP when it finishes.