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MEF Converter
Free MEF conversion with no upload. RAW files decode locally in the browser, so size is never a problem. The Windows app batches whole memory cards.
How to Convert .mef Photos in Bulk
1. Install reaConverter
2. Select MEF Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless MEF file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.
Edit & Enhance
Do more with your images
Converting MEF images for use in a workflow? Touch up, transform, apply editing and effects to your images during conversion.
Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.
User reviews
From those who tried it
Average User Rating:Last updated on July 26, 2026
Questions & Answers
MEF images: Frequently Asked Questions
What are MEF files?
MEF (Mamiya Electronic Format) is a raw photo format used by Mamiya and Phase One digital cameras. It is similar to other raw formats like CR2 (Canon) and NEF (Nikon), but is specific to these particular camera brands. MEF files contain all of the raw image data captured by the camera's sensor, as well as metadata and other information about the image. This allows for greater control and flexibility in post-processing, but also requires specialized software to work with.
Can reaConverter open MEF files?
reaConverter fully supports the MEF image format – open, edit, and export MEF files to any other popular file format with ease.
How do I change MEF to another format?
reaConverter is a user-friendly tool for converting MEF files. Once installed on your computer, it allows you to convert all your .mef files at once with just a few clicks. You can even convert mef images directly from Windows Explorer using the right-click menu — fast and convenient.
Can I convert MEF online?
If you only want to convert a few MEF images, you are welcome to try our free online MEF converter.
How can I turn MEF files on my computer to another format?
The best way to convert MEF images on your PC is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from MEF.
How can I automate MEF files conversion?
reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.
Can I convert MEF files using scripts or the command-line interface?
reaConverter provides full access to all its features from the Windows command-line shell, including the command-line mef converter.
What else can I do with reaConverter?
Convert PDFAdd watermark on imageConvert RAW filesConvert raster to vectorChange bit depth
What formats can I convert a MEF file to?
Discover More
Beyond MEF conversion
Convert .mef files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.
