Design Pro used both .zdl and .zdb files for its label designs, with .zdl files being used in the newer version of the program. We couldn't successfuly verify, whenever Design Pro is backwards compatible and allows users to save their new designs to older version. In any case, your best (and probably only) option is Design Pro.
Convert DesignPro label design to DesignPro label design.
We have found 2 software records in our database eligible for .zdl to .zdb file format conversion.
Microsoft Windows software - convert zdl to zdb on Windows
Avery Design & Print gives you the most flexibility while designing and printing Avery labels, business cards, dividers, t-shirt transfers, greeting cards and more. Quickly customize and print professional labels, business cards, dividers, greeting cards and more using the step-by-step guide.
Convert from zdl file
to zdb file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned zdl to zdb. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert zdl to zdb on OS X
Avery Design & Print for Mac is program for control all Avery products without Internet connection. Select a blank or pre-designed template, personalize text, add images and adjust colors. You can also add QR codes, sequential numbers and special shapes in your Avery document.