The short answer
To scan a QR code, open your phone’s Camera app, point it at the code so it fills most of the frame, hold steady for a second, and tap the notification that appears. Modern iPhones and most Android phones recognise QR codes automatically with the built-in camera — no extra app required.
The phone detects the three square “finder eyes” in the corners of the code, decodes the data, and offers an action (open a link, join WiFi, add a contact). You always have to confirm — nothing happens automatically until you tap.
How to scan a QR code on iPhone
On iOS 11 and later, the Camera app reads QR codes natively. Open Camera, point it at the code so it is in focus, and a banner appears at the top of the screen — tap it to open the link or perform the action.
If the banner doesn’t appear, check Settings ▸ Camera ▸ Scan QR Codes is on (it’s on by default). You can also open the code from a photo: swipe up on the photo and the detected link appears, or use the Control Center QR scanner button if you’ve added it.
How to scan a QR code on Android
Most modern Android phones scan QR codes with the built-in Camera or Google app. Open Camera, point it at the code, and a tappable link appears on screen. On Pixel and many devices, Google Lens suggestions handle the decode automatically.
If your camera doesn’t recognise the code, open the Google app and tap the Lens (camera) icon in the search bar, then point it at the code. Some Android manufacturers also ship a dedicated “Scanner” app, or you can add the QR scanner tile to Quick Settings.
Built-in camera vs a dedicated scanner app
For everyday scanning, the built-in camera is enough — it’s fast, needs no install, and opens links directly. A dedicated scanner app can be useful if your camera doesn’t recognise codes, if you scan in batches, or if you want a scan history.
| Feature | Built-in Camera | Dedicated Scanner App |
|---|---|---|
| Needs install | No | Yes |
| Works offline | Yes | Depends on app |
| Scan history | No | Often yes |
| Opens links directly | Yes (after a tap) | Usually yes |
| Best for | Everyday scanning | Power users / batches |
| Privacy | Handled by OS | Check app permissions |
What to do when a QR code won’t scan
If a code won’t scan, check the basics first: clean the camera lens, move closer or further so the code fills most of the frame, and add more light — low light and glare are the most common culprits. Make sure the whole code plus its white margin (the quiet zone) is visible.
If it still won’t read, the code may be damaged, too small for its scan distance, or low contrast. Try Google Lens or a scanner app, which are sometimes more tolerant than the default camera. See our QR code best practices guide for what makes a code reliably scannable.
Staying safe when scanning
A QR code is just a shortcut to something — usually a web link. Before tapping the banner, glance at the URL the phone shows and make sure it’s the site you expect. Don’t enter passwords or payment details on a page a code took you to without checking the address first.
Treat unknown QR codes in public the way you’d treat a shortened link in an email: scan if you trust where it came from, ignore if it looks tampered with or stuck over a legitimate code (a known abuse called QR phishing). The code itself can’t harm your phone — the risk is the destination.
Frequently asked questions
How do I scan a QR code with my phone?
Open the Camera app, point it at the code, hold steady, and tap the link banner that appears. On most iPhones and Android phones the built-in camera reads QR codes automatically — no app needed.
Do I need an app to scan a QR code?
Usually not. iPhones (iOS 11+) and most modern Android phones scan QR codes with the built-in Camera app. You only need a dedicated scanner app if your camera doesn’t recognise codes or you want scan history.
Why won’t my QR code scan?
Most often it’s low light, a dirty lens, the code too small or too far away, or the quiet zone (white margin) cropped. Clean the lens, get the code to fill the frame, add light, and make sure the whole code is visible.
Is it safe to scan QR codes?
A QR code can’t harm your phone by itself — the risk is the destination. Check the URL the phone shows before tapping, and don’t enter passwords or payment info on pages a stranger’s code opened. Avoid codes that look stuck over a legitimate one.