QR Codes Explained: How They Work and How to Create One for Free

A QR (Quick Response) code is a two-dimensional barcode that stores data — usually a URL, but also plain text, contact details, or Wi-Fi credentials — in a grid of black and white squares that any smartphone camera can read instantly.

How a QR code actually works

Unlike a traditional barcode, which stores data in a single line read left to right, a QR code stores data in both directions, letting it hold far more information in the same space. Three large squares in the corners help a scanner recognize the code's orientation, while the rest of the grid encodes the actual data using error-correction algorithms — which is why a QR code can still scan correctly even if part of it is smudged, torn, or covered by a logo.

What can you put in a QR code?

• A website URL — the most common use, sending someone straight to a page.
• Plain text — a message, instructions, or a Wi-Fi password that displays on scan.
• Contact info — a digital business card someone can save directly to their phone.

Why businesses use them

QR codes bridge print and digital. A restaurant menu, a product label, a poster, or a business card can all carry a QR code that sends a customer straight to a website, ordering page, or contact card — no typing required.

How to make your own, free

SaveIt's free QR code generator lets you create a custom QR code for a URL, text, or contact card, with your own foreground and background colors and a resolution up to 1024px — downloadable instantly as a PNG, no watermark, no signup required. If you create a URL-type code while logged in, every scan is tracked so you can see how it's performing.