Lupe

Fujifilm · RAF

Edit Fujifilm RAF files in your browser

X-Trans files from the X-T, X-S, X-E, X-Pro and X100 cameras open here at full resolution, on your own computer. Nothing is uploaded.

Try it here

Drop a RAF

A 40-megapixel X-T50 file opens in about a second. Then edit it by hand, or say what you want.

Drop a RAF hereor click to choose one

On a computer, up to 200MB. Nothing is uploaded.

Fujifilm’s X-Trans sensor arranges its colour filters in a six-by-six pattern rather than the usual two-by-two, which is part of why its files look the way they do and also why plenty of RAW software handles them badly or not at all. Loupe decodes them in your browser with LibRaw, the open-source library behind a number of desktop RAW tools.

About film simulations

This is the first thing most Fuji shooters ask, so plainly: Loupe does not reproduce Classic Chrome, Acros, Velvia or any other film simulation. Those recipes are Fujifilm’s and live in the camera.

What it does do is read the JPEG preview your camera embedded in the RAF, film simulation and all, and match its brightness and contrast. So the file opens as bright and as punchy as your camera made it, with neutral colour underneath rather than the simulation’s palette. You can get close to a look by asking for it (“muted greens, faded blacks, like Classic Chrome”), but it is an approximation, not Fujifilm’s recipe.

If you want the exact simulations applied to a RAF after the fact, Fujifilm’s free X RAW Studio does that, using your camera’s own processor over USB.

Speed, and one honest trade-off

On our test machine, a 40-megapixel X-T50 file opens in 1.1 seconds and exports at full size, 7752 by 5178, in about nine.

The trade-off is in how X-Trans is demosaiced for export. LibRaw has a slower three-pass method that took around 35 seconds a frame in a browser tab, which we judged too long, so Loupe uses the one-pass method. At normal viewing sizes you will not see a difference; at 100% on fine foliage, a desktop converter using the slower method can look a touch crisper.

What it does not do yet

  • Computer only; a phone browser does not get enough memory for a full-size RAW.
  • Exports JPEG, PNG or WebP, not DNG or TIFF, and without the camera’s EXIF data for now.
  • No lens profile corrections yet.

More on how RAW works here, and the other cameras we have tested, on the RAW page.