We’ve all been there: you need a quick QR code for a project, a client menu, or Wi-Fi access. You search for a free generator online, paste your link, print it out, and two weeks later... it stops working because it was a "trial" dynamic QR code locked behind a $15/month subscription.
Frustrated by tools that hold your static data hostage or route your private info through untrusted middleman servers, I decided to build QR Gen—a fast, free, and privacy-first QR code generator that runs entirely in your browser.
We recently launched on Product Hunt, and the response from the community has been incredible! I wanted to share the build approach and why taking a local-first approach matters.
🛠️ The Tech & Architecture: Client-Side First
Most commercial QR generators use dynamic links that route scans through their backend servers so they can charge you for analytics or expire your links.
QR Gen takes a strictly static, client-side approach:
Zero Server Storage / Privacy First: All matrix rendering and Reed-Solomon error correction happen directly in your local browser runtime. Whether you are generating a vCard with personal contact info or an encrypted Wi-Fi password, nothing touches a remote server.
Permanent Direct Encoding: The destination (URL, vCard details, crypto wallet address) is compiled directly into the 2D pixel matrix. The generated codes never expire because there are no backend servers to shut down or redirect through.
High Error Correction for Branding: When embedding custom logos or icons, QR Gen dynamically configures High (30%) Error Correction (Level H) using Reed-Solomon algorithms, guaranteeing reliable smartphone camera recognition even with custom center logos.
Vector Export (SVG) & Print Mode: Beside standard PNG/JPG exports, it supports infinite-resolution vector SVG rendering for high-DPI print media, packaging, and menus, complete with a clean CSS @media print trigger that strips away UI layout overhead.
💡 What It Supports
- Web Links & Direct URLs
- Instant Wi-Fi Credentials (WPA/WPA2/WPA3, WEP, Hidden SSIDs)
- vCard Digital Contact Cards
- Crypto Wallet Addresses (BTC, ETH, SOL, USDT, Pi)
- Custom Foreground/Background Palettes + Center Logos
- Clean SVG / PNG / JPG Exports & more.
🚀 Try It Out & Feedback
If you need a reliable generator for your next project or client setup, give it a spin:
👉 Check out the app: Free QR Code Generator
I’d love to hear your feedback from a technical standpoint—what customization features or developer utilities would you like to see next?
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