MRW to RB Converter

MRW to RB conversion — quick and online

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Wide Format Support

Beyond RB, Convertio handles OUT_COUNT+ output formats for MRW — find the perfect target for any workflow.

Quality Preserved

Minolta RAW data from MRW is carefully processed to produce high-quality RB output that preserves the original details.

Browser-Based Tool

Run the entire MRW to RB conversion in your web browser. No installations, no system requirements beyond internet access.

How to convert MRW to RB

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose rb or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your rb file right afterwards

About formats

MRW is the proprietary RAW image format developed by Minolta (later Konica Minolta) for their digital SLR and advanced compact cameras, introduced in 2001 with the DiMAGE 7, one of the first consumer-grade digital cameras to offer RAW capture alongside JPEG. MRW files capture the unprocessed 12-bit readout from the camera's CCD sensor in its native Bayer mosaic pattern, storing the data in a container format with a series of tagged data blocks for the raw image, camera settings, and proprietary metadata. The format was used across Minolta's digital camera lineup including the DiMAGE A-series advanced compacts and the Dynax/Maxxum 5D and 7D digital SLRs — the latter being the first DSLRs with built-in sensor-shift image stabilization, a technology later inherited by Sony when they acquired Konica Minolta's camera division in 2006. MRW files preserve the original sensor values needed for high-quality demosaicing, custom white balance, and exposure adjustment, giving photographers flexibility unavailable with the camera's in-body JPEG processing. One advantage is historical technological significance: MRW files from the Dynax 7D and its predecessors document the pioneering implementation of in-body stabilization and other innovations that became industry standards, and the RAW data preserves these early captures in their most flexible form. Continued compatibility is another strength — MRW files are supported by Adobe Lightroom, dcraw, LibRaw, RawTherapee, and other modern RAW converters, keeping these Minolta-era digital negatives fully usable with current processing algorithms.
Developer: Minolta
Initial release: 2001
RB is the native ebook format of the Rocket eBook, one of the first commercially available dedicated e-reading devices, developed by NuvoMedia and released in October 1998. Founded by Martin Eberhard and Marc Tarpenning — who later co-founded Tesla Motors — NuvoMedia designed the Rocket eBook as a handheld device with a reflective LCD screen, capable of storing approximately ten books in its internal memory. The RB format packages HTML-based content along with embedded images, metadata, and a table of contents into a single binary container optimized for the device's limited hardware. Content was purchased and downloaded through NuvoMedia's RocketLibrarian desktop software. A notable advantage of the format was its early support for bookmarking, annotation, dictionary lookups, and adjustable font sizing — features now standard on modern e-readers but revolutionary in the late 1990s. The Rocket eBook demonstrated viable commercial demand for dedicated reading devices, paving the way for subsequent platforms from Sony, Amazon, and others. NuvoMedia was acquired by Gemstar-TV Guide International in 2000, which discontinued the device line in 2003. While RB files are largely a historical curiosity today, they can be converted to modern formats using ebook management tools, and the format remains significant as a pioneering chapter in the evolution of digital reading.
Developer: NuvoMedia
Initial release: 1998

Frequently Asked Questions

Why convert MRW to RB?

With no new software updates for MRW support, converting these legacy Minolta RAW files to RB preserves them in a modern format.

What opens RB files?

RB files can be opened with RocketBook reader devices, Calibre, and legacy e-book applications.

Are my MRW files safe during conversion?

Uploaded MRW files are deleted immediately after conversion. RB outputs are automatically removed within 24 hours.

Do I need to pay for MRW to RB conversion?

Basic conversions are free for all users. Premium accounts provide extended limits and faster processing speeds.

How long does MRW to RB conversion take?

Most conversions finish in just a few seconds — server-side processing handles the heavy lifting, not your device.

What devices support this MRW to RB converter?

The converter works on any device with a web browser — desktop, laptop, tablet, or smartphone, regardless of OS.