QR Code vs Barcode: What Is the Difference?
QR code vs barcode explained: how they store data, what each is used for, how much they hold, and which one to choose for products, menus and marketing.
The short answer
A traditional barcode is a row of vertical lines (one-dimensional) that usually stores a short number, such as a product code. A QR code is a square grid of dots (two-dimensional) that can store much more, including web links, Wi-Fi details, contact cards and text.
Use a barcode for retail product identification and stock systems. Use a QR code when you want a phone to open a link, join a network or save a contact.
How they store data
A one-dimensional barcode encodes data in the widths of its lines and spaces, and it is read along a single direction. A QR code encodes data across both the horizontal and vertical directions of its grid, which is why it can hold far more in a small area.
QR codes also include error correction, so a code can still be read when part of it is dirty or covered. That is why a small logo in the center of a QR code can still scan.
Capacity
A standard QR code can hold thousands of characters depending on the content type and error correction level, while a typical retail barcode holds a short numeric code. In practice, most QR codes carry a short link, because shorter data makes a simpler code that scans faster.
How each one is scanned
Barcodes are traditionally read by dedicated laser or camera scanners at checkouts and in warehouses. QR codes are designed to be read by ordinary smartphone cameras, so people can scan them without installing anything on current iPhone and Android phones.
Which one should you use?
A quick guide:
- Selling physical products through retail stores: a barcode is required by most retailers.
- Linking to a website, menu, social profile or review page: use a QR code.
- Sharing Wi-Fi, a contact card or a calendar event: use a QR code.
- Tracking inventory internally: either can work, depending on your scanner.