JPEG to ORF

Looking to convert JPEG to ORF? Here's the honest answer — and what works instead.

You can't convert JPEG to ORF. ORF is a camera's own RAW format — it only ever comes out of the camera.

Why JPEG to ORF isn't possible

1

ORF is Olympus's in-camera RAW

ORF is the raw sensor data a Olympus camera writes at the moment of capture. It's produced by the camera's own hardware and firmware — software can read it, but nothing can manufacture a genuine ORF from a finished JPEG.

2

A JPEG has already been processed

Your JPEG is a developed, final image. The extra sensor information a ORF carries — wider dynamic range, full color depth, untouched highlights — was discarded when the photo was first saved, and can't be put back.

3

It is locked to one camera maker

ORF is proprietary to Olympus. Even other RAW formats (NEF, ARW, RAF…) aren't interchangeable with it — there is no universal "save as RAW" that produces a real ORF.

The RAW formats — and where they come from

Every real RAW file is one of these camera-maker-specific formats, written by the camera itself:

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Format details

JPG (JPEG) is a lossy raster format that compresses photographs into small files by discarding detail the eye barely notices — the most widely used photo format on the web and in cameras.

Full nameJoint Photographic Experts Group
Developed byJPEG Group
Released1992
Extension.jpeg
MIME typeimage/jpeg
TransparencyNo

JPG opens in every browser, image viewer and editor with no special software.

ORF is Olympus/OM System’s raw photo format from OM-D and PEN cameras.

Full nameOlympus Raw Format
Developed byOlympus
Released2003
Extension.orf
MIME typeimage/x-olympus-orf
TransparencyNo

ORF opens in Lightroom, Capture One and OM Workspace.

Frequently asked questions

No. ORF stores the raw signal a Olympus sensor recorded at capture. A JPEG is a finished image with that data already baked in and discarded — there's nothing for a converter to reconstruct.

RAW formats like ORF give maximum editing latitude — but only when they come straight from the camera. Converting a JPEG to ORF would just wrap a finished image in a RAW container, with none of the benefits.

DNG is an open RAW container. You can convert a camera's own RAW (including ORF) into DNG, but you still can't turn a regular JPEG into ORF or any real RAW.

JPEG converts cleanly to PNG, JPG, TIFF and WEBP — free, no sign-up, no watermark.