Guides
QR code print size: minimum dimensions, quiet zone, distance
Scan distance divided by 10, a 4-module quiet zone, strong contrast: the simple rules for sizing QR codes on business cards, flyers, and posters.
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QR Code & Barcode Blog
Guides, tutorials and comparisons on QR codes and barcodes
Tutorials
QR code with logo: brand it without breaking scannability
Putting a logo in a QR code works because of error correction — if you respect the size limit, the quiet zone, and level H. Here's the method.
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Privacy
QR codes and personal data: what you should never encode
A QR code is readable by anyone who sees it and forgets nothing ever. Health data, credentials, GDPR: what should never end up encoded inside one.
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Privacy
Quishing: how to spot a malicious QR code before scanning
A sticker over a QR code, a shortened URL, an urgent payment request: the warning signs of QR code scams and the habits to check before scanning.
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Tutorials
Scan a QR code from an image or screenshot — no camera needed
A QR code received by email, saved in a screenshot, or spotted in a photo: import the image and decode it locally — nothing gets uploaded anywhere.
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Privacy
Scan QR codes in your browser without uploading anything
Decoding happens in your browser: neither the image nor its content ever leaves your device. How to check that a scanner is truly client-side.
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Tutorials
Wi-Fi QR code: share your Wi-Fi without ever saying the password
Create a free Wi-Fi QR code in seconds: your guests scan once and join the network. The password stays in the pattern, never sent to a server.
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Comparisons
Static vs dynamic QR codes: which one do you actually need
Static means content fixed forever, free. Dynamic means an editable redirect with scan analytics, usually paid. The simple rule to choose.
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Tutorials
vCard QR code: a business card that saves contacts in one scan
Generate a free vCard QR code: name, phone and email land straight in the scanner's contacts — no app, no typing. Ideal for business cards and events.
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