Working with DYMO Label Web Service
What is the DYMO Label Web Service?
In the past, developers had to provide a browser-specific plug-in for each major web browser. Nowadays, most browsers have phased out native plug-in support. Google, for example, stopped supporting Chrome their NPAPI browser extension in September 2015. In response, we released the DYMO Web Service as a new cross-browser solution allowing third-party developer applications the ability to interface with the DLS SDK in a seamless, browser-agnostic fashion. It handles all printer-related requests from the JavaScript Library that the DYMO Label Framework browser plug-ins used to perform.
How can I tell if the DYMO Label Web Service is running?
You should see the DLS application icon within the system tray. Right-click this icon to display a context menu. The menu displays the web service’s status (i.e., “Started on port 41951” or “Stopped”).
The following shows what it looks like on Windows.
On Mac, the DLS application icon and context menu will appear within the system tray like this:

DLS icon and context menu (Mac)
If you do not see the Dymo Webservice icon
If you do not see the Dymo Webservice icon on your computer, this is imperative for your Dymo to connect to the Internet browser. Please follow the steps below.
WINDOWS COMPUTER
1. If you can't find it there, and you don't see it when clicking that small arrow, you can use your Start Menu search to find it. Just search for "DYMO Webservice" and click on the program when it appears.
2. If you're not able to get to it there, open your system folder and follow the path:
Windows (C:) > Program Files (x86) > DYMO > DYMO Label Software
Then double click the file "DYMO.DLS.Printing.Host"
3. Your icon should appear in your system tray within seconds.
MAC COMPUTER
1. Select your Hard Drive to appear on your desktop. Click Finder > Preference to get to your Finder Preferences. Check "Hard disks":
2. Click "Macintosh HD" on your desktop.
3. From there, navigate to Library > Frameworks > DYMO > SDK and click "DYMO.DLS.Printing.Host"
Once you open that, your icon should appear in seconds.
How can I start the DYMO Label Web Service?
If your DYMO Label Web Service does not say Started on port: port # within the 41951-41960 range, your Dymo cannot connect to the Internet browser. You can start the web service at any time by right clicking on the service’s icon in the system tray and choosing the Start service menu item.
How can I configure the DYMO Label Web Service?
Clicking the Configure menu item will cause a configuration window to appear. This allows you to change the language and listening port. The web service will normally try to use the first available port within the 41951-41960 range. You can override this behavior by checking the Use single port checkbox, which makes the service only try using the specified port only. You cannot specify a port number that does not fall within the specified range. The service will not try using any other port if an error occurs while using this option.
How can I tell if the DYMO Label Web Service is functioning properly?
Click the Diagnose menu item within the context menu while the service is running. If the self-test succeeds, a dialog box will appear asking you to open a test page in your browser to see if SSL certificate is working.
Click the Yes button to open your default web browser. The browser should display a page indicating the web service is running correctly. The page address should be something to the following effect:
The port number may vary from machine to machine.