ZPL is absolute-position ( ^FOx,y ). The converter must:

Have you built a similar converter? What challenges did you face with font scaling or barcode alignment? Let us know in the comments below.

: XML uses entities like & which can break ZPL formatting if not decoded before sending to the printer.

: Many systems use XSLT (Extensible Stylesheet Language Transformations) . You create a template that "looks" at your XML and generates the corresponding ZPL string as the output.

The gap between them can cause bottlenecks. You might have perfect order data in an XML file, but your thermal printer only understands ZPL commands like ^FO50,50^AD^FDHello World^FS . Manually converting this data is error-prone and slow.