PRINTER LAB / PRN.10
Barcode and QR-Code Test
Real Code 39 and QR symbols at multiple sizes, with preserved quiet zones, test bar edges, module fidelity, scaling, and practical scan reliability.
I/O CHECKUP / PRN.10
Barcode and QR test
- PAPER
- A4
- ORIENTATION
- Portrait
- PAGE
- 1
Barcode and QR test: a controlled physical comparison
Use it before printing inventory labels, tickets, packaging, forms, or documents whose machine-readable symbols must survive the chosen printer and media.
01 / INSPECT
What to inspect on paper
- The white quiet zone around every symbol remains clean and unclipped.
- Narrow bars and small square modules have crisp, separated edges.
- Symbols scan from the intended working distance with more than one device when possible.
- Printed size matches the labeled reference when scale is 100%.
02 / HEALTHY OUTPUT
What a clean result looks like
- The large and medium symbols scan quickly and repeatedly.
- Small symbols remain square without ink spread closing gaps.
- Black fills are dense while adjacent white modules stay open.
03 / LIMITS
What the result does not prove
- Passing this page is not regulatory or production-label certification.
- Gloss, curved packaging, low contrast, scaling, and camera quality affect scanning.
- Verify the exact data, symbology, size, and standards required by the real workflow.
HONEST BROWSER BOUNDARY
The sheet is the diagnostic instrument.
I/O Checkup prepares the controlled pattern and opens the browser print dialog. A webpage cannot reliably read your printer model, queue, driver faults, ink or toner level, maintenance state, or mechanical condition. Diagnose those systems with the printer manufacturer’s utility after the physical sheet shows a repeatable symptom.