Frequently Asked Questions
Last updated: October 18, 2026
Is AH QR Scan & Generate free?
Yes. Scanning, generating, downloading and history are all completely free. The app is supported by ads.
Do I need to install anything?
No. Use a modern browser with camera support, or upload a QR image. You can add a home-screen shortcut where your browser supports it. Check our Android App page for download availability.
Why does the app ask for camera permission?
The camera is needed to read QR codes. Images are decoded on your device and are never uploaded or saved.
The camera doesn't start. What can I do?
Make sure you allowed camera access in your browser settings, that no other app is using the camera, and that you are on a secure (https) page. Reloading the page usually helps.
How do I connect to Wi-Fi with a QR code?
Open Generate, choose Wi-Fi, enter the network name and password and pick the security type. Guests can scan the code with their phone camera to join without typing the password.
What is a contact (vCard) QR code?
It stores your name, phone, email, company and website. When scanned, the phone offers to save you as a new contact.
Do the QR codes I create expire?
The QR pattern has no expiry date because it stores the data directly. A linked website may still move, expire or go offline, and Wi-Fi credentials can change. Decoding does not guarantee that the destination is still available.
Where is my history saved?
Without an account, history stays in your browser on this device. When signed in, it is saved to your account so you can see it on any device.
Can I use generated QR codes commercially?
Yes. You can print them on flyers, menus, packaging or business cards with no attribution required.
Is it safe to open any scanned link?
Not always. Read the link shown in the result before opening it. See our QR Safety Guide for tips on spotting malicious codes.