Fields (use a label containing “BARCODE”, “CODE” or “QR” to render a barcode):
Saved templates live in this browser’s local storage. The R2/Worker storage design in docs/STORAGE.md shows how to make libraries shared/versioned when you deploy.
Live preview (approx. 2 px / mm):
Raw ZPL (203 dpi, ready for a Zebra/EPL print server — map 1:1 into BarTender/NiceLabel/Loftware formats):