Key takeaways:
- Most iPhone and Android phones scan a QR code with the built-in camera app, no download needed.
- For a code in a screenshot or photo, use Google Lens or Circle to Search instead of the camera.
- Denso Wave says error correction level M restores about 15% of a dirty or damaged code.
- The FTC's September 3, 2026 alert says to inspect the previewed link before opening any QR code.
To scan a QR code, open the camera app on your iPhone or Android phone, point it at the code and tap the link or banner that appears on the screen once the code is recognized.
Yet scans still fail on a restaurant menu, a parking sign or a checkout counter: the camera is in the wrong mode, the code sits on your own screen, or the light is too poor to focus.
This guide covers the Camera app and Code Scanner on iPhone, the camera, Google Lens and Quick Settings on Android, then screenshots and computers, with a troubleshooting table by symptom, the security check the Federal Trade Commission recommends, and the cases where an NFC tap beats a scan.
How do you scan a QR code?
You scan a QR code by pointing a phone or tablet camera at it and tapping the link that appears. The camera decodes the pattern on its own, so most people never need a scanner app from the App Store or Google Play.
- Open the camera app on your mobile device.
- Scan the QR code by holding the camera steady.
- Tap the link or banner to open the website, app or payment page.
At a checkout, a customer who scans the code on a counter plate for reviews lands on the business's Google review form without typing a URL or searching Google Maps.
How do I scan a QR code on an iPhone?
An iPhone scans a QR code with the Camera app or with Code Scanner in Control Center. The steps are the same on an iPhone or iPad: point the device at the code, then tap to open the content.
Open Camera from the Home Screen, the Lock Screen or Control Center. Per Apple's support article on QR codes, the link then opens websites, apps or tickets.
For Code Scanner, open Control Center, tap Scan Code and aim at the code. It is the fastest option when the camera keeps switching modes.
- Open Control Center.
- Touch and hold the background of the screen, then tap Add a Control.
- In the Control Center gallery, tap Scan Code, then tap anywhere to return.
How do I scan a QR code on an Android phone?
An Android phone scans a QR code with its camera app, a Quick Settings tile or Google Lens. Labels vary by maker, but each method ends with a link you tap.
To enable QR code scanning on a Pixel, Google's help page says to turn on Camera scan suggestions. With Camera from Google, use photo mode or the QR mode button: you can't scan a QR code in portrait or video mode.
For the tile, swipe down from the top and tap Scan QR code, or add it in Quick Settings. The Android guide to scanning QR codes also points to Google Lens, which can detect several codes at once.
A counter plate pairs an NFC chip with a printed QR code, so iPhone and Android users open your review form in seconds. It activates in a few minutes and has no subscription.
See the review plate →
How do I scan a QR code from a screenshot or picture?
To scan a QR code from a picture or screenshot, open the image in Google Lens or use Circle to Search. The camera cannot see its own screen, so a code sent to you by email needs one of these tools.
On select Android devices, press and hold the home button (or the navigation handle with gesture navigation), then circle the code. Circle to Search decodes it on the spot.
On iPhone or Android, open the Google app, tap Google Lens in the search bar and pick the saved image from Screenshots or the photo picker.
How do I scan a QR code on a computer?
A computer scans a QR code with its webcam or with Google Lens in Chrome. Windows 10 and Windows 11 read codes in the Camera app, and Chrome can search a code image on a web page.
- Windows Camera app: choose the Barcode button and hold the code up to the webcam; the link appears at the bottom.
- Chrome: right-click the image and select Search with Google Lens.
Why won't my phone scan a QR code?
A phone won't scan a QR code when the camera is in the wrong mode, the code is too far, too small or badly lit, or the print is damaged. The table matches each symptom to a cause and a fix.
| Symptom | Likely cause | Fix |
|---|---|---|
| No banner appears | Portrait or video mode, scan setting off | Switch to photo mode or use Code Scanner |
| Image stays blurry | Phone too close to the code | Step back until the whole code fits the frame |
| Flicker, no result | Glare on glossy paper or low light | Tilt the phone, add light, avoid shadows |
| Fails at the edges | Margin cut or cropped | Frame the full white border |
| Code on your screen | Camera can't see its own display | Save the image, then open it in Google Lens |
A small code needs a close phone; a code across a room must be printed large. Owners can check print sizes in this guide on sizing a review QR code.
Denso Wave, which invented the QR code, requires a four-module wide margin at all sides, so a design that trims the white border often breaks the scan.
Error correction level M, the level most often selected, restores about 15% of the data in a dirty or damaged code, according to Denso Wave's error correction guide.
Are QR codes safe to scan?
QR codes are safe to scan when you check the destination before opening it. The scan only decodes an address; the risk starts when a malicious code sends you to a fake site built to steal payment or personal data.
QR code scams, sometimes called quishing, include fake codes stuck over real ones on parking meters, the case behind a Federal Trade Commission alert.
Inspect the URL link. Many QR readers preview the link they will send you to. Make sure there are no spelling mistakes or switched letters in the link before you click.
Federal Trade Commission, consumer alert, September 3, 2026The preview helps only with a domain you recognize, and many dynamic codes show a generator's short link instead; see this comparison of redirecting dynamic codes.
The FTC also advises keeping your operating system updated and using multi-factor authentication. A code that asks for a password right away deserves suspicion.
- Do: read the previewed address and verify the spelling of the domain.
- Do: look for a sticker placed over the code on a meter or sign.
- Don't: enter credit card details on a page opened from a code you did not expect.
When is an NFC tap easier than scanning a QR code?
An NFC tap is easier than scanning a QR code when the phone can touch the object, as at a counter. The customer holds the phone near the tag instead of opening the camera and waiting for focus.
Apple's Core NFC documentation states that iPhone XS and later read NFC tags in the background, then show a notification; tap the notification to open the page. Android phones with NFC turned on can open a web link from a tag too.
Apple lists one limit: background reading is unavailable while the camera is in use. That is why a tag should keep a printed QR code. Chip types and range are covered in this explainer on how NFC tags work.
Digifeel review plates follow that pattern, with an NFC chip and a QR code on the same plate.
Frequently asked questions
What is a QR code?
A QR code, short for quick response code, is a two-dimensional type of barcode that stores a website address or contact details in a grid of black and white modules. Denso Wave developed it; today it appears on menus, tickets and product packaging.
Do I need a QR code scanner app?
Most people don't need a QR code scanner app, because the native camera app on iPhone and most Android phones decodes QR codes. A third-party scan app adds its own privacy policy and terms of service, so check what data it collects before you download it.
Why does a QR code open an app instead of a website?
A QR code opens an app when its link belongs to an installed app, such as a payments app, a ticketing service or a social media app. The phone hands the link to that app instead of the browser. Without the app installed, it usually opens as a web page.
Your next QR code scan
Learning how to scan QR codes takes one tool you already carry: point the camera, wait for the banner, check the address, then tap. When that fails, the fix is usually more light, a step back or a switch to Code Scanner or Google Lens. The habit worth keeping is reading the link first. Try it now: add the Scan Code control on your iPhone or the Scan QR code tile on your Android phone, so the scanner is one swipe away.
