Barcode Checker: How to Validate GTIN, EAN and UPC Before Printing
Learn how the GTIN/EAN/UPC check digit works and use the barcode checker to catch errors before they reach the packaging line. Full tutorial.
Tutorials
Blog
Blog — Page 13
Page 13 of 22
Use Cases
QR Code for Audio: share MP3 and voice messages with a QR Code
Learn how to create an audio QR Code for MP3 files, voice messages, audio guides, and podcasts. Full tutorial, use cases, hosting tips, and common mistakes.
Use Cases
Email QR Code: open the mail app with recipient, subject, and body pre-filled
Create a mailto: QR Code that opens the email app with To, Subject, and body ready to send. Use cases, step-by-step guide, common mistakes, and free generator.
Use Cases
QR Code for Images and Photo Galleries: open an entire album on your phone
Learn how to create a QR Code that opens a single image or a full photo gallery on any smartphone. Use cases, step-by-step guide and common mistakes.
Tutorials
Password-Protected QR Code: exclusive access for the right audience
Learn how to create a password-protected QR Code on Code2Scan. Secure confidential documents, B2B price lists, paid courses, and VIP content easily.
Use Cases
SMS QR Code: open a pre-filled text message with one scan
Create a QR Code that opens the SMS app with the recipient number and message already filled in. Perfect for contests, opt-ins, and support lines.
Tutorials
Link Shortener: what it is, how to use it, and how to track clicks
Turn long URLs into short, trackable links. Learn how to shorten a link for free, measure clicks by channel, and connect with QR Codes on Code2Scan.
Tutorials
Online Barcode Reader: scan any barcode from your phone or PC — no app needed
Learn how to read barcodes online without installing any app. Scan EAN, QR Code and more using your camera or a photo. Practical guide with common errors and fixes.
Tutorials
What Is a QR Code and How Does It Work: The Complete Beginner's Guide
Understand in simple terms what a QR Code is, how your camera reads the little squares, what it can hold, and where to use it. A clear guide for beginners.
Use Cases
QR Code for App Store & Google Play: One QR That Detects the User's Device
Create a single QR Code that sends iPhone users to the App Store and Android users to Google Play automatically. Tutorial, use cases, and install tracking.
Use Cases
QR Code for Telegram: how to create and use for channels, groups, and profiles
Learn how to create a Telegram QR Code for your profile, channel, group, or bot. Step-by-step guide, t.me destination table, common mistakes, and scan tracking.
Use Cases
Digital Business Card with vCard Plus: Full Page, QR Code & Trackable Contacts
Learn the difference between vCard and vCard Plus, how to build a digital card with photo, logo, buttons and QR Code on Code2Scan — and why it looks more professional.