Most used first
QR code not scanning? A fast troubleshooting checklist
The real-world reasons QR codes fail (contrast, quiet zone, blur, density, glossy print) and the quickest fixes that work on iPhone/Android.
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Guide hub
Practical QR guides for scan, print, and launch work
Fix scan failures, create business card and redirect QR flows more reliably, and ship campaigns with cleaner decisions on format, placement, and tracking.
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Total guides50
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Begin with the high-frequency guide set
These are the guides that solve the most common QR problems first: scan failures, business card sizing, file format, and dynamic-vs-static decisions.
Payloads
WiFi QR Code: iPhone/Android format (works reliably)
Exact WIFI: payload format, what “Encryption” means, and how to avoid scan failures on iPhone/Android (special chars, hidden networks).
Printing
Do SVG QR Codes Scan Better Than PNG? Usually for Print
Short answer: usually yes for print. SVG stays sharp when resized, while PNG is fine for screens if exported large enough and never upscaled.
Printing
QR color, contrast & quiet zone: the print rules that actually matter
Why quiet zone is non-negotiable, how to choose colors that scan, and what backgrounds (patterns, gradients) break QR detection.
Printing
Best QR Code Size for Business Cards: 20-25 mm (0.8-1.0 in)
Use 20-25 mm (0.8-1.0 in) for most business cards. Includes minimum size guidance for short URLs, larger sizing for vCards, quiet zone rules, and a card dimensions chart.
Which vCard fields actually get saved on iOS/Android, what to keep minimal, and how to avoid bloating the QR for better scans.
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Browse guides
Open the guide you actually need next
Use the archive when you already know the problem you want to solve.
Editor pick
UTM tracking for QR codes: measure scans in Google Analytics
How to add UTM parameters to QR destinations, which UTM fields matter, and how to keep URLs short enough to avoid dense QRs.
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Printing
QR for posters/signage: size by scan distance (print-ready table)
How big should a QR be on posters and signs? Use a simple distance→size table, plus placement and glare tips for real-world scanning.
Printing
QR error correction (L/M/Q/H): which one to choose (practical)
Pick the right error correction level for print/screens/logos. Learn the trade-off: higher correction = denser QR = needs larger print.
Marketing
Business Card QR Code Generator Guide (vCard, Size, Placement)
Create QR code for business card using a vCard workflow, with size, placement, quiet zone, label text, and scan fixes. Covers business card, visiting card, and name card use cases.
Payloads
URL QR Code: fast setup (free)
How to create a URL QR code, shorten long links, and keep scans reliable.
Step-by-step: create a business card QR code (vCard), pick the right fields, test-save to Contacts, and print at 20-25mm with a quiet zone so it scans fast. Also useful for visiting card / name card QR code searches.
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Static vs dynamic QR code explained: what changes, what scans faster, when redirect or editable QR is worth it, and when static is enough.
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How a redirect QR code works (dynamic/editable QR), how to create a QR code redirect to a website, how to update the destination later, and why you can’t edit a static QR image.
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Business card QR code not scanning? Quick fixesTroubleshooting
If your business card QR code won't scan, fix the usual causes: size, quiet zone, blur, density, and contrast.
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Event QR codes: quick checklistMarketing
Create event QR codes that work for registrations, check-ins, and meeting links.
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Where to place business QR codes and how to keep scans reliable.
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How to scan a QR code on Android (Camera, Google Lens)Troubleshooting
Step-by-step: scan QR codes on Android using the camera app or Google Lens. Includes scanning from a screenshot and quick fixes if it won’t scan.
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How to create a Zoom meeting QR code (or webinar QR): which link to use, plus print tips for reliable scans.
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Scan QR code from an image (screenshot) online - no uploadTroubleshooting
How to scan a QR code from an image, screenshot, or photo in your browser (privacy-friendly). Tips if decoding fails.
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Explore more
Move sideways when you need a different path, not just another article
Jump into topic hubs, search-facing use-case pages, or the guide cluster when a single guide is no longer enough.
Topic hubs
Open the topic mapFollow grouped paths for business cards, social flows, and redirect QR strategy.
Use-case pages
Business Card QR Code Use CasesStart from packaging, signage, print, and onboarding intent when that matters more than article browsing.
Generate a business card contact QR that opens a save-to-contacts flow instead of sending people to a plain web page.
Guide cluster
Open the guide pillarFollow the highest-value supporting articles around reliability, format choice, and QR strategy.
Begin with the main cluster page, then branch into the supporting guides only where the rollout needs more depth.