QRU? - QR Code Debugger

Scan & Decode URL Components

QRU? is a free, open-source QR code debugger built for developers. Scan any QR code and instantly see its URL broken down into color-coded components — protocol, host, path, and query parameters — each highlighted in a distinct color.

Stop guessing what's inside a QR code. Whether you're debugging deep links, testing universal links, inspecting API endpoints, or verifying redirect URLs, QRU? parses and displays every URL component so you can debug at a glance.

KEY FEATURES

• Colorized URL Breakdown — Protocol, host, path, and query parameters are each highlighted in a distinct color for fast visual parsing
• Instant QR Code Scanner — Point your camera at any QR code and see results immediately
• QR Code Generator — Generate a QR code from any scanned URL to share with other devices
• Scan History & Log — Keep a searchable log of every scan, revisit and manage them anytime
• Copy Any Component — Tap any URL component to copy it to your clipboard
• No Ads, Ever — Completely free with no ads, no tracking, and no in-app purchases
• Open Source — Full source code available on GitHub

BUILT FOR DEVELOPERS

QRU? was originally built to debug Expo EAS Update QR codes, but it's the perfect developer tool for any QR code you encounter. Deep links, universal links, custom URL schemes, API endpoints, OAuth redirect URLs — if it's encoded in a QR code, QRU? will break it down for you.

USE CASES

• Deep link testing and debugging
• Universal link verification
• API endpoint inspection
• Redirect URL analysis
• Query parameter validation
• Custom URL scheme debugging
• OAuth callback URL inspection
• Expo and React Native development

WHY QRU?

Most QR code scanner apps are bloated with ads and designed for consumers. QRU? is a focused developer tool that does one thing well: it shows you exactly what's inside a QR code, broken down into its component parts. No ads, no tracking, no subscriptions. Just scan and debug.

Download QRU? and stop squinting at QR codes.