QR codes: from file to print
A testing checklist for posters, cards, menus and promotional materials.
Choose a stable destination
A QR code stores an address. When you generate a code for a Tyn.bio link, the image points to the short address; editing the destination of that same link keeps the code useful. Deleting the link or changing its short address can break materials already distributed. Keep a record of the address printed on each item.
Preserve contrast and space
Use a uniform light background and dark modules. Do not crop the margin around the code or stretch the image in only one direction. Avoid placing it over photos, folds, curved surfaces or reflective areas. A logo over the center can make scanning harder; use the file without overlays when reliability is the priority.
Choose the size through real testing
No single size works in every situation. Scanning distance, print quality, lighting and the camera all affect the result. Print a sample at the final size and test from where people will stand. Increase the code size if the camera takes too long to recognize it or the device must be brought too close.
Include a readable alternative
Write the short address beside the QR code for anyone unable to use a camera. Add a clear description of the destination, such as “Open the catalog.” This helps people decide before visiting. Never present a code without explaining where it leads, especially for payments or forms.
Validate before printing in quantity
Download the PNG in the dashboard, make a print proof and scan the code with more than one device. Confirm the domain shown by the camera before continuing. After publishing, track clicks for the chosen link. QR file downloads and link clicks are different measures: a download is not a scan of the code.
Questions about this guide? Contact the team.