What Does QR Code Stand For? (And How QR Codes Work)

QR code stands for Quick Response code. It was invented in 1994 by Denso Wave, a Japanese company, to track car parts quickly — the name comes from how fast scanners could read it.

How a QR code works

A QR code is a grid of black and white squares. The three big squares in the corners tell the camera where the code is and which way up it is. The small squares store data, usually a web link, plus extra error-correction data so the code still scans if part of it is dirty or covered by a logo.

What can a QR code hold?

• A website link (most common).
• Wi-Fi network details — see /wifi-qr-code-generator.
• Contact cards (vCard).
• A pre-written email, SMS or WhatsApp message.
• A map location.

Static or never-change code?

A static code holds the link itself and is free forever, but it can't be changed after printing — a new link means a new code. A never-change code (Pro, $5/month or $49/year) points to a permanent getlinkly.app address, so you can change where it goes anytime, see how many people scanned it, and it keeps working even if you cancel. This is the difference most people miss: the code itself never changes, but with a never-change code the destination can.

Frequently asked questions

Who invented the QR code?

Masahiro Hara and his team at Denso Wave in Japan, in 1994.

Is QR code free to use?

Yes. Denso Wave holds the patent but chose not to enforce it, so anyone can create and use QR codes.

How much data can a QR code store?

Up to about 4,000 characters, but shorter content makes a cleaner, easier-to-scan code.

Are QR codes safe?

The code is just data. Only scan codes from sources you trust, and check the link preview your phone shows before opening it.

Make your own QR code free at /qr-code-generator.