QR code not scanning? How to fix it
When a QR code won't scan, it's almost always the camera setup, the lighting, or the code itself. Work through these and one of them will fix it.
Fixes to try, in order
- On iPhone, check Settings › Camera and make sure Scan QR Codes is turned on.
- Use the rear camera, and clean the lens — a smudge blurs the code.
- Move so the whole code is in frame, then adjust distance: too close won't focus, too far loses detail.
- Add light. Low light and glare are the most common reasons a code fails; move to a brighter spot or tilt to kill the reflection.
- If it still won't read, try the Scan Code control in Control Center, and tap its flashlight if the light is poor.
- Or scan with Scan QR Code Master: its Settings include Start with Torch On, which turns on the flashlight when the scanner opens.
If the code itself is the problem
- Low contrast (light-on-light, or a busy background) makes a code unreadable — codes need clear dark modules on a light background.
- A missing 'quiet zone' (white margin) around the code can stop it scanning.
- A torn, wrinkled, or partly covered code may have lost too much data to recover.
- A code shown on a screen can flicker or glare; try increasing that screen's brightness.
FAQ
- Why does my phone see the QR code but nothing happens?
- The camera may be reading it but the action is blocked — for example a link that needs the screen unlocked, or QR scanning disabled in Camera settings. Try the Scan Code control in Control Center instead of the Camera app.
- Can a damaged QR code still be scanned?
- Sometimes. QR codes have built-in error correction that can recover a code with up to roughly 30% damage, depending on how it was made. If a scan fails, try a cleaner copy of the code.
Scan and create QR codes in a tap
Scan QR Code Master is an ad-free QR and barcode scanner and generator, free to download for iPhone, iPad, and Mac — with history and one-tap sharing.
Download on the App Store