ZPL printer / JS provider is a free Chrome extension developed by Alexander Neverovsky. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory.

This extension allows users to send and print ZPL format commands to network ZPL printers. It provides the capability to print any raw data from JavaScript directly to ZPL printers, such as Zebra printers.

To use this extension, users can simply send ZPL commands to a specified printer. For example, to print a barcode with the number, users can use the following code:

```

window.postMessage(

{

type: "zpl",

cmd: "print",

raw: "^XA^FO50,50^B8N,100,Y,N^FD1234567^FS^XZ"

});

```

Additionally, the extension provides a listener to receive messages from the extension. Users can listen for events like the version of the extension or the status of printing.

Overall, ZPL printer / JS provider is a useful Chrome extension for printing ZPL format commands to network ZPL printers, making it convenient for users who require ZPL printing capabilities.