Looking to turn a PNG into a ORF file? Here's the honest answer — and what actually works instead.
You can't convert PNG to ORF. ORF is a camera's own RAW format — it only ever comes out of the camera.
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 PNG.
Your PNG 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.
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.
Every real RAW file is one of these camera-maker-specific formats, written by the camera itself:
PNG is a lossless raster format with full transparency. It keeps every pixel intact, making it ideal for logos, icons, screenshots and graphics with sharp edges.
How to open PNG opens in every browser and image viewer, plus Photoshop, GIMP, Preview and Photos.
Full PNG format guideORF is Olympus/OM System’s raw photo format from OM-D and PEN cameras.
How to open ORF opens in Lightroom, Capture One and OM Workspace.
Full ORF format guideLossless and uncompressed — ideal for editing, archiving and print.
PNG → TIFFA small, universal photo format that opens everywhere.
PNG → JPGA modern format with small files at high quality for the web.
PNG → WEBPConvert your ORF and other camera RAW files to JPG, PNG or TIFF.
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