QR Code vs Barcode: Which One Goes on Your Product?

The short version

What a barcode is really doing

A barcode is a picture of a number. That is genuinely all it is — those stripes encode something like 6291041500213 and nothing else. There is no name in there, no price, no photo. The number is only meaningful because your POS holds a record saying "this number is the 500ml olive oil, and it costs $8".

Which is why a barcode has to be saved against the product. The number is arbitrary, so the system must be told what it stands for. In YellowPOS you either type in the barcode printed by the manufacturer, or you generate your own for items that never came with one — handmade goods, bakery items, anything you package yourself.

The payoff is speed and accuracy at the counter. A scan takes a fraction of a second, works at any angle, and does not care whether the internet is up. For a shop with a few hundred products, barcodes are the difference between a thirty-second checkout and a two-minute one, and they remove the class of mistake where a tired cashier rings up the wrong variant at the wrong price.

What a QR code is really doing

A QR code is a picture of text — and it holds a lot more of it, which is why it is a square grid rather than a row of stripes. In retail the text is almost always a web address. For a product QR code in YellowPOS, that address is the product's page on your own store, something like yellow-pos.com/your-business/product/42.

Because the code holds the address rather than the product's details, nothing has to be saved and nothing goes stale. The system rebuilds the code from the product whenever you ask for it. A sticker printed in March still shows August's price and August's photos, because it was never carrying that information in the first place — it was carrying directions to it.

The payoff is on the shop floor rather than at the till. A customer holding your product gets your full product page: every photo, the complete description, all the variants with their stock, and a way to buy it without queueing.

Why you cannot swap one for the other

People sometimes ask whether QR codes could just replace barcodes and save printing two things. In practice, no:

• Till scanners mostly cannot read QR codes. The handheld laser scanner on your counter reads one-dimensional barcodes. Reading QR requires an image-based scanner, which is a different and more expensive device.
• A QR code needs the internet to be useful. The code opens a web page. Barcode scanning is entirely local, which matters during a power cut or when the connection drops mid-shift.
• Customers will not scan a barcode. There is no phone app in normal use that turns your barcode into your product page. The camera reads QR codes natively; it does nothing with a barcode.

Going the other way is just as bad — a barcode cannot hold a web address, so it can never send anyone anywhere.

So which do you print?

Start from the problem you actually have.

Checkout is slow, or staff ring up the wrong item. That is a barcode problem. Generate barcodes for the products that do not have them, stick them on, and give your counter a scanner.

People pick things up, look at them, and put them back. That is a QR code problem. They did not have enough information and were not going to ask. Give them the product page.

Both. Which is most shops, eventually. A shelf label with a barcode on one side and a QR code on the other serves your staff and your customers at once, and costs the same sticker either way.

In YellowPOS both live in the same place: open Products, click Label Generator, and pick either QR Code Generator or Barcode Generator. Same label sizes, same printer settings, same print dialog.

A third case worth knowing about

There is a variety of barcode that carries more than an identifier: the labels printed by weighing scales, which hide both the product code and the weight inside the digits. If you sell cheese, meat, or produce by the kilo, that is the one you want, and it is a separate topic.

Frequently asked questions