Use short HTTPS links
Long links make dense codes that phone cameras struggle with. Shorten very long URLs first and start with https:// so phones open them directly.
Make link, Wi‑Fi and contact QR codes or product barcodes, tune colours, add a logo, download PNG/SVG — or generate dozens at once for attendance and labels, right in your browser.
Review before printing — tap any code to download just that one
Three tabs at the top: QR codes for links and data, barcodes for products and assets, and batch mode when you need dozens at once.
Long links make dense codes that phone cameras struggle with. Shorten very long URLs first and start with https:// so phones open them directly.
Dots must be clearly darker than the background (never light-on-dark), keep at least 4 modules of quiet zone, and print no smaller than 2×2 cm.
For internal codes (students, assets, books) CODE 128 is all you need. EAN-13 is for retail products and its numbers must be registered with GS1 to avoid clashes.