Offline-first QR generation with modern UX.
Create QR codes instantly in your browser. Everything runs locally, even when the internet is unavailable.
Haolei QR Code Generator is built as a Progressive Web App (PWA) with full offline support. Once you visit the site for the first time, all essential files are automatically cached on your device using a Service Worker.
When you first load the app, a Service Worker installs in the background and caches the HTML pages, stylesheets, scripts, translation files, and the app logo. After that initial visit, the entire application is available from your browser's cache — no internet connection required.
The app uses a network-first strategy for pages and a cache-first strategy for assets. This means you always get the latest version when online, but everything still works seamlessly when you lose connectivity. The cache updates automatically whenever a new version is deployed.
Whether you are on an airplane, in a remote area with no signal, or simply want a fast experience without waiting for network requests, Haolei QR Code Generator is ready to use. No installation needed — just visit once and you are set.
Your data stays on your device. No tracking, no server processing, just fast QR generation.
MIT-licensed and easy to customize for your own workflows.
