Claris Organizer Format
Apple, Inc.
Misc Files
mime-type/not-avalible
11/05/2021
If you want to edit JJJS file and not damage it, you should install dedicated software Of course, there are probably JJJS Online Editors available, but none of them will be able to provide such a wide range of available options as dedicated software.
The installation of the program that supports the JJJS file does not guarantee that the file can be edited. Additional information about the JJJS file extension can be found here.
This is the best way. Try to open the JJJS file with one of the programs and it will see if you can edit the JJJS 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 JJJS file (so it is very possible that they can edit files in JJJS format).
And here is the full list of programs supporting the JJJS file
Some file formats are just plain text files that you can open with Notepad. But beware - making manual changes to the JJJS file or another may result in its damage. After saving the changes, it may not be possible to reopen the JJJS file. For this reason, try to use software created to edit JJJS files.
It seems that one of the software on the list must be able to edit the JJJS files. Use other options if you still haven't found a way to edit JJJS. Below are tools that allow you to edit JJJS online files.
Free Online File Edit Service
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