How QR Code Works
How QR Code Works explained in plain terms, with the practical effect it has on a QR code you generate.
What How QR Code Works Means
How QR Code Works is one of the details that affects how a QR code is designed, generated, or read. Understanding it helps you pick the right settings and spot the cause if a code fails to scan.
Practical Applications
Knowing about how works has direct practical benefits. It affects how you design QR codes, where you place them, and how reliably they scan. Apply this to create codes that work consistently across devices and environments.
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Open GeneratorFrequently Asked Questions
Can I add my logo to the QR code?
Yes. Use the customisation panel to upload a logo image. It appears in the centre of the QR code. Error correction is automatically increased to maintain scanability.
Do QR codes created here expire?
No. Our QR codes are static: the data is encoded directly in the code. They work as long as the linked content exists.
What is the best size for printing a QR code?
Minimum 2cm x 2cm (about 0.8 inches) for close-range scanning. For posters or signs viewed from a distance, increase the size proportionally. A rough rule: 1cm of QR code for every 10cm of scanning distance.
Is my data safe?
Yes. QR codes are generated entirely in your browser using JavaScript. Your data is never sent to any server. We cannot see what you encode.
Which download format should I choose?
SVG for print (infinite scalability), PNG for digital use and social media, JPEG for smaller file sizes. SVG is the safest choice for most use cases.