Royal Mail Mailmark barcode generator
Enter your data below, check the live preview, and download it as PNG, SVG, or a print-ready PDF.
Need many at once? Bulk Royal Mail Mailmark generator
About Royal Mail Mailmark
Royal Mail Mailmark is a 2D Data Matrix symbol that replaced the earlier 4-state barcode for business mail, carrying posting and routing data in a compact square.
Valid input
- Structured Royal Mail payload: Mailmark barcode indicator, version, class, supply chain ID, item ID, destination postcode, return-to-sender postcode, and data-matrix code content.
- All fields are fixed-width - populate unused fields with the Mailmark-specified filler characters.
- Must use Royal Mail-issued supply chain and item IDs.
Related barcode types
Guides
- How to Print Barcode Labels That Actually Scan
DPI, X-dimension, quiet zone, and the handful of print settings that decide whether your label works. A practical guide for anyone printing labels at real volume.
- Why Won't My Barcode Scan? A 7-Step Checklist
A checklist for diagnosing barcode scan failures, covering quiet zones, contrast, print resolution, physical damage, wrong symbology, check digits, and scanner distance.