Looking to turn a JPG into a RW2 file? Here's the honest answer — and what actually works instead.
You can't convert JPG to RW2. RW2 is a camera's own RAW format — it only ever comes out of the camera.
RW2 is the raw sensor data a Panasonic 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 RW2 from a finished JPG.
Your JPG is a developed, final image. The extra sensor information a RW2 carries — wider dynamic range, full color depth, untouched highlights — was discarded when the photo was first saved, and can't be put back.
RW2 is proprietary to Panasonic. Even other RAW formats (NEF, ARW, RAF…) aren't interchangeable with it — there is no universal "save as RAW" that produces a real RW2.
Every real RAW file is one of these camera-maker-specific formats, written by the camera itself:
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.
How to open JPG opens in every browser, image viewer and editor with no special software.
Full JPG format guideRW2 is Panasonic’s raw photo format used by Lumix cameras.
How to open RW2 opens in Lightroom, Photoshop and Panasonic software.
Full RW2 format guideLossless and uncompressed — ideal for editing, archiving and print.
JPG → TIFFLossless with transparency — perfect for graphics, logos and screenshots.
JPG → PNGA modern format with small files at high quality for the web.
JPG → WEBPConvert your RW2 and other camera RAW files to JPG, PNG or TIFF.
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