The latest articles on DEV Community by Ali Erdem (@ali_erdem_c51af7fae823857). https://dev.to/ali_erdem_c51af7fae823857 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3950345%2Fdb69c5af-96de-4d3f-94cb-b6af22a47ba0.png https://dev.to/ali_erdem_c51af7fae823857 en Ali Erdem Mon, 25 May 2026 09:24:42 +0000 https://dev.to/ali_erdem_c51af7fae823857/i-built-a-free-qr-code-generator-with-nextjs-and-supabase-heres-what-i-learned-4gpl https://dev.to/ali_erdem_c51af7fae823857/i-built-a-free-qr-code-generator-with-nextjs-and-supabase-heres-what-i-learned-4gpl <p>I was looking for a simple QR code generator for a side project. Everything I found was either full of ads, paywalled, or just ugly.<br> So I built QR Einfach from scratch.<br> The tech stack</p> <p>Next.js for the frontend and routing<br> Supabase for auth and database<br> QR code generation directly in the browser (no server-side rendering needed)</p> <p>What it supports</p> <p>URL, WiFi, vCard, WhatsApp, PDF, Google Reviews<br> Bulk QR code generation<br> Export as PNG, SVG, ZIP, CSV or PDF</p> <p>What I learned<br> Generating QR codes client-side is fast and keeps the server load minimal. The tricky part was bulk export — packaging multiple SVGs into a ZIP on the browser side without a backend call.<br> Supabase made auth surprisingly easy. I had login, user sessions and a basic dashboard running in a day.<br> Try it<br> <a href="https://www.qreinfach.de/en" rel="noopener noreferrer">https://www.qreinfach.de/en</a><br> Feedback welcome — especially if you spot something weird on mobile!</p> nextjs supabase webdev opensource