Barcode Generator - Build and check EAN-13, UPC-A and EAN-8 numbers with the GS1 check digit worked out term by term. The bars are drawn here as an inline SVG rather than fetched from an outside service, and the prefix is looked up so you know which GS1 office issued it.
QR Code Generator - Seven kinds of payload, one symbol: a web address, a Wi-Fi network, a contact card, a text message, a phone number, an email address or plain text. The code is encoded and drawn in your browser as a vector image, so a network password on a table card never reaches an outside server.