Convert DNG to JPG
A Pro feature: the open RAW format, developed into an ordinary picture.
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DNG, the Digital Negative, is the RAW format Adobe published so that RAW files would not depend on one camera maker. Leica, Pentax and some other cameras can save it directly, Lightroom converts other RAW files into it, and phones use it when you turn on RAW capture, including Apple's ProRAW.
Like every RAW file, a DNG is sensor data rather than a finished picture, so it has to be developed before anyone can look at it. This page does that and returns a JPG at full resolution, using the white balance stored in the file. A file from a Leica M8 was among the ones we tested with.
One limit matters with DNG in particular. Edits made in Lightroom or Camera Raw are stored as instructions next to the sensor data, not in it, so they are not applied here: you get the picture as shot. If you need the edited version, export it from Lightroom. Some DNG files hold already-processed pictures instead of sensor data (linear DNG, many ProRAW files); these are read too, and when one cannot be, the embedded preview is returned with a note. DNG development, like all RAW development, is a Pro feature. Each DNG is uploaded over an encrypted connection and deleted within one hour.
Phone RAW looks plainer than the phone's own photo
Most DNG files now come from phones, taken with a RAW or Pro mode in the camera app. People who try it for the first time are often disappointed by what they see. The ordinary photo from the same phone is bright and crisp, and the developed DNG is darker, flatter and noisier.
The explanation is that a phone's normal photo is a small feat of computing. It merges several exposures, lifts the shadows, protects the sky, sharpens the result and removes noise. A plain RAW capture is a single reading of a very small sensor with none of that applied, and that is what is developed here. Apple's ProRAW and similar formats sit in between: they keep the merged, noise-reduced data and leave the styling to you. Raise brightness and contrast in the editor to bring any of them closer to what the phone showed.
Drones and action cameras
The other large source of DNG is aerial and action photography. Drones and many action cameras save RAW in this format, and their lenses are very wide. As with any RAW file, the corrections the device applies to its own JPGs are missing from the developed picture: horizons can curve, corners darken, and colour fringes appear along bright edges at the borders of the frame.
For a quick look at a flight's pictures, or to send a client a first selection, that seldom matters. For finished work, develop them in a RAW editor that has a lens profile for the device.
DNG as an archive format
Some photographers convert every RAW file they own to DNG, for good reasons. The format is published, so software will be able to read it long after a camera maker's own format is forgotten. It can hold the original file inside it, a full-size preview and the editing instructions in one place. The cost is that tools which only display the stored preview show the edited picture, and tools which develop the sensor data, as this one does, show the unedited one. Which of the two you are looking at is the first thing to check when a DNG does not look as expected.
Frequently asked questions
Are my Lightroom edits included?
No. Lightroom stores edits as instructions beside the image data. This page develops the picture as it was shot.
Does it read Apple ProRAW?
ProRAW files are DNG files and are accepted. If one cannot be developed, you get its embedded full-size preview, with a note saying so.
What does "preview only" mean in the result?
The file could not be developed, so the picture the camera or program stored inside it was used instead.
Is DNG better than JPG?
For editing, yes: it keeps everything the sensor recorded. For viewing and sharing, JPG is what every device opens.
Why does my drone photo look curved at the edges?
The lens is very wide, and the correction the drone applies to its own JPGs is not part of the RAW data. The developed picture shows what the lens actually projected.
How large can a DNG be?
Up to 200 MB. Pictures of more than 50 megapixels are developed at half their width and height, and a warning tells you when that has happened.