A QR (Quick Response) code is a two-dimensional barcode that encodes data — typically a URL, plain text, contact details or Wi-Fi credentials — as a grid of black and white squares that a camera can read almost instantly. Unlike a traditional 1D barcode, which only stores data along one line, a QR code stores data in two dimensions, letting it hold far more information in the same physical space, and still be read correctly even if part of it is damaged or obscured, thanks to built-in error correction.

This tool generates a QR code entirely in your browser from whatever text or link you enter, then lets you download it as a JPG image or a PDF, ready to print on a poster, ID card, certificate or notice.