Privacy
Business card QR codes and personal data
A practical guide to business card qr codes and personal data: methods, checks, limits, and reliable QR code or barcode advice.
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QR Code & Barcode Blog
Guides, tutorials and comparisons on QR codes and barcodes
Guides
QR codes on flyers: choosing a useful call to action
A practical guide to qr codes on flyers: choosing a useful call to action: methods, checks, limits, and reliable QR code or barcode advice.
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Guides
QR codes on invitations: what should the code contain?
A practical guide to qr codes on invitations: what should the code contain?: methods, checks, limits, and reliable QR code or barcode advice.
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Guides
QR codes for restaurant menus: a practical setup guide
A practical guide to qr codes for restaurant menus: a practical setup guide: methods, checks, limits, and reliable QR code or barcode advice.
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Tutorials
How to scan a QR code: iPhone, Android and no app needed
Scan a QR code with your iPhone or Android camera — and without installing any app thanks to the online scanner that decodes in the browser.
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Guides
QR code won't scan: 7 causes and their fixes
Weak contrast, size too small, quiet zone cropped, excessive density: why your QR code refuses to read and how to fix it before the print run.
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Guides
What does a barcode contain? Anatomy of an EAN-13
Quiet zones, guard bars, check digit: what the bars of an EAN-13 barcode really hide — and why the price isn't in there.
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Comparisons
BarcodeDetector vs ZXing: decoding barcodes in the browser
The BarcodeDetector API decodes natively but isn't supported everywhere; a ZXing fallback covers the gap. Browser support, formats, and strategy.
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Tutorials
Prefill a QR generator via link: the ?content= parameter
A link that opens the generator already filled in: the ?content= parameter for sharing a ready-made QR code in an email signature or a doc page.
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