How to Make a vCard QR Code for Your Contact Details
A vCard QR code turns a scan into a saved contact: name, phone number, email, company, and website appear in the person's address book, ready to sav…
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QR Code Best Practices: Size, Contrast, Error Correction, and Testing
A QR code that won't scan is worse than no QR code at all. Most failures come from a handful of avoidable mistakes: too small, too little contrast,…
Building a Fast, Free Online QR Scanner and Generator (Open Source)
Hi Dev Community! 👋 I wanted to share a project I recently launched: QRScanner . Most online QR code tools out there are either hidden behind a payw…
I built an Aadhaar QR reader that works 100% offline — no server, no data leak
Every time I handed my Aadhaar card to someone for KYC, one thought kept nagging me: Where is this data actually going? Most "digital Aadhaar verifi…