How do I scan a QR code with my iPhone?
Open PDF Scanner, switch to QR mode, and hold the code steady in the frame — it decodes and shows you the contents. The step people skip is reading the decoded result before tapping it: a QR code is just an opaque container for text, and the only way to know where a printed code leads is to look at the address it produced.
The short version
- PDF Scanner includes a dedicated QR code scan mode alongside document, ID card, business card, passport and book modes.
- Decoding happens on the iPhone; the code image is not uploaded to a server.
- QR mode works with no network connection, though opening a decoded link obviously needs one.
- A QR code carries arbitrary text, so the decoded result should be read before it is acted on.
- Requires iOS 16 or later, with no account needed.
Step by step
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Switch to QR mode
Choose QR from the scan modes. This mode is looking for a code pattern rather than a page outline, so it will not try to crop a document around it.
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Fill a reasonable part of the frame
Hold the phone so the code occupies a decent share of the view and keep it roughly square-on. Very small printed codes need you closer; very large ones on a poster need you further back.
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Steady the shot and give it light
Decoding needs the pattern to resolve. Camera shake and dim light are the two usual reasons a code will not read.
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Read the decoded result before acting
Look at the address or text that comes back. A code on a sticker in a public place can lead anywhere, and reading the destination first is the only real protection.
Frequently asked
- Why will my QR code not scan?
- Usually distance, focus or light. Move closer for small codes, back off for large ones, hold steady until it focuses, and add light if you are in a dim room. A damaged, creased or partly covered code may not decode at all.
- Can I scan a QR code from a screen?
- Usually yes, though screen glare and refresh patterns interfere. Raising the other screen's brightness and holding the phone slightly off-axis helps.
- Is it safe to open what a QR code contains?
- Treat a printed code like a link from a stranger. Read the decoded address first, and be especially careful with codes stuck onto parking meters, menus and posters, where a sticker can be placed over the original.
- Does scanning a code send anything to a server?
- Decoding happens on the iPhone, so the scan itself does not transmit anything. Opening a decoded link is a normal web request, which of course does.
- Can I save a QR result?
- Yes — a scanned QR result is recorded locally in the app's history on your device rather than being kept only for the moment it is shown.
Last updated 2026-07-28