IMAGE GUIDE
How to prepare a DNG phone photo for upload
A DNG can retain RAW image data, but many upload forms ask for a JPG and a smaller file.
Keep the original DNG
DNG is a published RAW format used by cameras and some phones. A JPG is a rendered, compressed image, not an editable replacement for the original RAW data. Save a separate JPG and keep the DNG if you may want to edit the photo later. Adobe describes the DNG format.
Convert a copy to JPG
- Open the DNG-to-JPG tool and choose your DNG file. You can select up to 10 images.
- JPG is selected, with a 100 MB output maximum. If your form specifies a lower maximum, enter it. Add pixel dimensions only if required.
- Process the file and check the preview, dimensions, format and actual size shown before downloading.
The tool develops supported DNG sensor data in your browser instead of silently using an embedded preview. Colours and rendering may differ from your camera or other RAW software. Some DNG variants are unsupported, so check the result and keep the original.
When the form asks for 5 MB or less
Choose a 5 MB maximum in the converter, or use the 5 MB tool and select JPG. In this utility 5 MB means 5,000,000 bytes per output file. If exact dimensions are required, enter them; if the file cannot fit at those dimensions, you can try another accepted setting instead of submitting an unchecked image.
Why a large phone photo might fail
The application accepts each input up to 100 MiB, 60 megapixels and 16,384 pixels per side, but those are safeguards rather than a promise that every phone can process the largest image. A batch may contain up to 10 files, with retained output capped at 200 MiB. If your device runs out of memory, try a smaller file or a more capable device.