Basic ^BQN sample
The common data prefix is LA before the payload. Test the final printed size, not only the browser zoom level.
^XA
^PW812
^LL406
^FO80,60^BQN,2,8
^FDLA,https://zplpreview.com^FS
^XZSeparate data prefix, encoding and physical scan tests
^FDQA, selects Q error correction and automatic input mode. Keep the prefix separate from the user payload. A Unicode or URL payload must survive decoding unchanged; seeing a square pattern is insufficient. Leave a clear quiet zone and avoid shrinking the exported image in a document editor. A decoded screen image still does not certify thermal print quality.
^XA
^FO40,40^BQN,2,4
^FDQA,https://zplpreview.com^FS
^XZ