QR Code Generators
A QR code on a business card or leave-behind can open your portfolio. Many generators are free; QR Code Generator is free for static codes. Copy your portfolio address, paste it into the generator, and download the code as an SVG or a high-resolution PNG for print. Test the printed code with two different phones before you finalize the piece.
Use a QR code only when it serves the piece; see the Leave-Behind Concept for when a scannable element earns its place.