KDC to JNG Converter
FileFlip converts KDC to JNG entirely inside your browser, using ImageMagick compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a KDC file to JNG?#
- Drop your KDC file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to JNG and the conversion starts on its own. FileFlip downloads 14.1 MB of WebAssembly the first time and nothing after that, then runs ImageMagick on your own machine.
- Save the JNG file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting KDC to JNG lose quality?#
Yes, once. KDC keeps everything and JNG does not, so this is the first time the file meets a lossy encoder. At high quality the difference is hard to see, and it is worth keeping the KDC original, because every later re-save of the JNG loses a little more.
Is it safe to convert KDC files online?#
Yes, because nothing is uploaded. FileFlip converts KDC files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What KDC to JNG actually does to the file#
Converting KDC to JNG runs on ImageMagick, downloads 14.1 MB of WebAssembly the first time and nothing after that, encodes a lossless source with a lossy encoder for the first time.
| Engine | ImageMagick |
|---|---|
| Conversion path | One step: KDC → JNG |
| Downloaded to your browser | 14.1 MB, once, then cached by your browser |
| Quality | Lossy, first generation |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
Worth knowing before you start:
- camera raw is demosaiced with ImageMagick's defaults, which will not match the camera's own rendering
- some cameras write lossily compressed raw, so the source is not always a complete sensor record
What is a KDC file?#
A KDC file holds raw sensor data from a Kodak camera, though the extension covers two unrelated file structures: an older TIFF-based format used on 1990s DC-series models like the DC40, DC50 and DC120, and a separate format Kodak reused on later EasyShare P-series and Z-series cameras.
KDC only matters when opening images pulled from an old Kodak DC-series or EasyShare P/Z-series camera; there is no reason to create one today.
Convert KDC to DNG or TIFF for long-term storage, since Kodak's cameras are discontinued and support for the older of the two KDC variants is thin in current software.
What is a JNG file?#
A JNG file holds a single still image whose colour data is compressed as baseline or progressive JPEG inside the same chunk-based container PNG uses, with an optional PNG- or JPEG-encoded alpha channel for transparency.
There's little reason to create a new JNG file today; the format only makes sense inside an existing MNG animation that already mixes JPEG and PNG frames.
Convert JNG to JPG or PNG for anything meant to display in a browser, since none of the major browsers render JNG natively.
KDC to JNG questions people ask#
What camera made this KDC file?
A KDC file was written either by a 1990s Kodak DC-series camera such as the DC40, DC50 or DC120, or by a later Kodak EasyShare P-series or Z-series camera. The two eras use different internal structures despite sharing the same extension.
What still opens a KDC file today?
KDC files open in raw converters built on the LibRaw library, such as RawTherapee and darktable, which list both the older DC-series and the later EasyShare P and Z-series models among their supported cameras.
What should I convert a KDC file to for long-term storage?
Convert KDC to DNG or TIFF, since Kodak stopped making cameras in 2012 and DNG or TIFF will stay readable long after raw converters drop support for a discontinued camera line.
What opens a JNG file?
JNG files open in GIMP, Gwenview and ImageMagick-based tools, but no mainstream web browser renders them. That gap is the main reason JNG never spread beyond the small set of software built around the MNG format.