Use cases
From a real job to a scannable code: what to encode, how to print it, and which settings actually change the result.
QR codes
Wi-Fi QR Code: Let Guests Join Without Typing a Password
A Wi-Fi QR code joins guests to your network without typing the password. What to encode, how iPhone and Android handle it, and how to print it.
vCard QR Code: A Contact Card That Scans Into the Address Book
A vCard QR code puts name, company, phone and email into one scan. Learn the 3.0 fields, the size limit and where the card actually opens.
PIX QR Code: A Static BR Code for Brazilian Payments
Generate a static PIX QR code from a CPF, CNPJ, email, phone or random key. Understand the EMV fields, the CRC check and the txid.
URL QR Code: Turn a Link into a Printable Code
How to turn a URL into a static QR code, choose a link that survives a redesign, size it for print and test it before the run.
WhatsApp QR Code: Open a Chat with the Message Already Typed
Build a wa.me link with an E.164 number and a prefilled message, then print it as a QR code. Covers number format and what the scan opens.
Restaurant Menu QR Code: Size, Glare and Web Menu vs PDF
A restaurant menu QR code needs the right size, matte lamination and a web menu rather than a PDF. Sizing, placement and update advice.
Google Review QR Code: Point Guests at Your Review Page
Create a QR code that opens your Google Business review form, place it where guests will actually scan, and stay within platform policy.
Event QR Code: Check-in, Tickets and Per-Attendee Codes
Event QR codes for check-in, tickets and badges: one code per attendee, screen brightness, batch generation and print formats that survive a queue.
Labels & barcodes
EAN-13 Barcode: From GTIN to a Retail-Ready Label
Turn a GTIN into an EAN-13 barcode: check digit, quiet zones, retail print size, and what marketplaces ask for before you list a product.
GS1-128 Label: Application Identifiers on a Logistics Label
Build a GS1-128 label with AI 01, 10 and 17, understand the FNC1 separator, and print a logistics label that warehouse scanners read.