Digital Negative Image Format
If you need to edit the DNG file, one of the safest methods is to download and install the software dedicated to working with DNG files. Of course, there are probably DNG Online Editors available, but none of them will be able to provide such a wide range of available options as dedicated software.
Please note that not every program that supports DNG will allow you to edit the file. Additional information about the DNG file extension can be found here.
This is definitely the surest way. Use any of the programs that support the DNG file to check if it allows you to edit the file. It's safest to download the software from the developer's website. You can find direct links to the creators' websites on the subpages of each application. Below you will find some examples of software programs that support the DNG file (so it is very possible that they can edit files in DNG format).
All available programs supporting the DNG file
Remember that many file types have a text format and you can preview their contents by opening them, for example, with Windows Notepad. But beware - making manual changes to the DNG file or another may result in its damage. After saving the changes, it may not be possible to reopen the DNG file. It is safest to use software that was created to edit files in the DNG format.
It is actually certain that one of the applications working with files in the DNG format will be able to edit the file. Use other options if you still haven't found a way to edit DNG. Verified websites with the option to edit the file in the DNG format below.
Free Online File Edit Service
Copy and paste this link anywhere.