How Do QR Codes Work? Modules, Error Correction & Finder Patterns Explained
The technical
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Digital visiting card guides for Indian businesses
Digital visiting card blog for QR sharing, WhatsApp sharing, and business growth
Learn how to use online visiting cards to share your profile, build trust, collect leads, improve networking, and grow your business with practical QR and WhatsApp-based strategies.
15 practical guides
Built for QR, WhatsApp, and mobile sharing
Featured digital business card guides
Showing 12 guides on this page.
Featured Guide
Updated 12 Sept 2026
Digital Business Card Apps in India: A Practical Comparison
A transparent buying guide for comparing digital business card products in India without assuming that one tool is best for every business.
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Featured Guide
Updated 12 Sept 2026
NFC Business Card vs QR Code Business Card: Which Fits Your Workflow?
NFC uses a compatible physical tag for tap-to-open sharing, while QR uses a visible code that a phone camera can scan. The same online profile can support both.
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Featured Guide
Updated 8 Apr 2026
Digital Visiting Card vs Printed Visiting Card: When to Use Each
Compare digital and printed visiting cards by physical handoff, updates, contact actions, QR sharing, and follow-up. See when using both together makes sense.
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How to Add a Free Business Listing on Digiting Card
Learn how to add a free business listing on Digiting Card with steps, review tips, required details, approval process, and mistakes to avoid.
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How to Create a Digital Business Card
Learn how to create a digital business card with simple steps, mobile-friendly layout, QR code sharing, WhatsApp use, and mistakes to avoid.
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How to Create an Account on Digiting Card
Learn how to create a Digiting Card account, verify your email, and start building your digital business card step by step.
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How to Install Digiting Card on Mobile
Learn how to install Digiting Card on your Android phone or iPhone in a few simple steps.
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How to Share Digital Visiting Card on WhatsApp
Learn how to share a digital business card on WhatsApp using links, QR codes, WhatsApp Business, short messages, and follow-up tips.
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How to Write Digital Visiting Card URL to NFC Card
Learn how to write your digital business card URL to an NFC card using NFC Tools, with steps, mistakes to avoid, and testing tips.
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QR Code Size Guide for Print — Business Cards, Posters & Packaging
How big should a QR code be for a business card, poster, table tent, or product label? A practical sizing guide based on scan distance and data length.
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QR Code vs Barcode: What
QR codes and barcodes both encode data, but differ in capacity, dimensions, and scan angle. Here
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