QR codes have crept into almost every corner of our digital lives: in restaurant menus, posters, museums, payment systems, discounts and formsAnd although it may seem that you need a special app to read them, in most cases your mobile phone already has everything you need, especially thanks to Google Lens.
If you want to know How to read QR codes with Google Lens and other integrated tools On Android and iPhone (both from the camera and from photos, screenshots or even the computer screen), here is a very complete guide, explained calmly and in a friendly and natural Spanish from Spain.
What is a QR code and why is it used so much?
A QR (Quick Response) code is a two-dimensional barcode capable of storing much more information than the classic line barcode. It can be read with a mobile phone camera or with specific professional readers.
Normally, when you scan one of these codes, the mobile phone recognizes its content and displays a quick action: open a web page, display text, show a coupon, initiate a payment, or save a contactThat's why you see it in:
- Restaurants and bars: access to the menu, the daily menu or reservation forms.
- Public spacesMuseums, parks, squares or exhibitions that provide expanded information.
- Electronic paymentsSend and receive money through banking apps or payment gateways.
- Advertising and products: links to websites, discounts, technical support or manuals.
In accessibility, the QR code plays a key role because It allows access to complex information quickly and easily.This is very useful for people with visual, cognitive or device handling difficulties, especially when combined with screen readers like TalkBack.
Read QR codes with the Google Camera
On many Android phones, the most direct way to read a QR code is to use the Google Camera, which includes QR code detection without installing anything (although this feature is not available on all devices).
The usual process Scanning with the Google Camera is very simple:
- Open the Google Camera app on your mobile.
- Choose how you want to scan the QR code:
- You can use the QR mode If your camera offers it: select the “QR” option and point it at the code.
- Or you can use the normal photo mode and simply focus the QR code in the frame.
- Point the camera at the QR code and wait for it to appear a banner or card at the bottom or top with the available link or action.
- Click on that banner to open the website, launch the payment app, or display the text that contains the QR code.
Keep in mind an important detail: Many mobile phones do not allow scanning QR codes in portrait mode or video modeSo if you see that it doesn't detect it, switch to standard photo mode.
How to read QR codes with Google Lens on Android?
Google Lens is a Google tool that allows recognize text, objects, products and, of course, QR codes and barcodesYou can open Lens from several places: Google Assistant, the Google search widget, or the Chrome browser itself.
Scan a QR code from the Google Assistant
On many Android devices, Google Lens is integrated within Google AssistantSo you can use it without overcomplicating things:
- Hold down the home button, the physical button, or perform the gesture corresponding to open the Google Assistant.
- When the Assistant appears, tap the Google Lens icon (usually in the shape of a square camera).
- Point the camera at the QR code, making sure that Make sure it's well centered and completely within the frame.
- Check that Lens is in the general search mode (magnifying glass icon) so that it recognizes the QR code without problems.
- When it detects the code, tap on the QR area and you will see its content: Web links, text, contacts, product information, or payments.
In this way, the mobile phone interprets the content and lets you perform the action directly as appropriate, such as opening a link or saving a contact in the address book.
Read a QR code from the Google widget or from Chrome
Another very practical way to use Google Lens on Android is through the Google search widget or from the Chrome browser itselfThis is very useful, for example, when you're in a bar and want to open the menu via QR code.
- On the home screen, press and hold on an empty space and enter "Widgets".
- Find the widget Google and drag it to the desktop if you haven't already placed it there.
- In the search bar (widget or Chrome), you'll see a square icon that looks like a cameraThat's Lens.
- Tap it to open the Google Lens camera, and accept the camera and storage permissions if prompted.
- Choose "Search with the camera", frame the QR code and wait for Lens to recognize it.
- Tap on the QR code on the screen to display the information: text, link, menu, contact information, or whatever you have encoded.
From that moment on, you'll have a super convenient shortcut on your mobile to Check restaurant menus, offers, or web pages simply by opening Chrome or the Google widget and pulling Lens.
Scan QR codes with TalkBack and accessibility on Android
For people who use screen readersThere is an alternative way to scan QR codes on Android by using the TalkBack menu (depending on the device version and manufacturer):
- Open the TalkBack menu and enters into the system's actions.
- Tap on the option “quick setup” (it is usually the only item in the list).
- In that menu, the last item is usually “scan QR code”.
- Select that option, place your mobile phone in front of a QR code and wait for the system to announce that The QR code has been scanned.
Not all devices offer exactly the same path, but the idea is to take advantage of accessibility options so that make reading the QR code as guided and simple as possible..
How to scan QR codes on iPhone using the camera and from the Control Center?
On iPhones you don't need to download anything to read QR codes, because the The Camera app and Control Center already include a built-in scanner. that works very well.
Use the iPhone camera to read the QR code
El most direct method It's simply using the Camera app:
- Open the application Camera from your iPhone.
- Position the mobile phone so that the QR code appears within the framealways using the rear camera.
- Keep the phone at a distance where the code occupies a good portion of the screen but without being cropped.
- As soon as the system recognizes the QR code, it will appear a notification at the top with the available link or action.
- Tap that notification to Open the website or app related to the code.
This This method is perfect for restaurant menusposters, physical advertisements, QR code tickets and any code you have in front of you printed or on another screen.
Code scanner from Control Center on iPhone
Apple also offers a shortcut to a QR code scanner from the Control Centerwhich can be even faster than opening the classic camera:
- Go to Settings> Control Center and add the “Code Scanner” if it doesn’t already appear.
- Swipe to open Control Center and tap the code scanner icon.
- Focus the QR code with the rear camera, letting the code fit well within the box.
- When it's detected, you'll see the corresponding action and you'll be able to Open the link, app, or associated content.
To improve detection, the QR code should be well illuminated, and if it is not recognized at first, do the following: slight circular movements with the phone to assist with autofocus.
Read QR codes from photos or screenshots with Google Lens, Photos and Gallery
You don't always have the QR code physically in front of you. Often it's sent to you. by Whatsappemail or social media, or you have it in a screenshot or a photo already saved in the galleryIn these cases you can also use Google Lens and similar features on both Android and iOS.
Scan a QR code from the Photos app on iPhone/iPad
Since iOS 15, Apple allows Recognize QR codes directly within the Photos appwithout the need for third parties. The system can even suggest banking apps if the QR code corresponds to a payment.
- Open the app Photos on your iPhone or iPad.
- Go to your albums and open the image containing the QR code (This can be a photo or a screenshot).
- Keep your finger pressed down about the QR code itselfIf it is recognized, a pop-up window will appear.
- In that window you will see options such as “Open in Safari” or “Open in Chrome”, or shortcuts to banking apps if the code is paid.
- Tap the browser or the corresponding app and The scanning process ends by accessing the content.
This way, you don't need another device to scan a payment QR code or a link that someone has sent you as an image: Everything is done from the photo saved on your iPhone..
Scanning a QR code from the photo gallery on Android
On Android you can also read QR codes that are already saved as images on your device. Photo gallery, normally using Google Lens integrated:
- Open the Photo gallery or the Photos app on your mobile phone.
- Locate and open the image containing the QR code.
- Tap the icon Google Lens or the “Lens” option that appears at the bottom or in the menu.
- Lens will analyze the image and display the link or the corresponding content to the QR code.
- Tap the link or action to complete the scan, just as if you had read it with the camera.
This trick is perfect when someone sends you, for example, a payment QR code, an invitation, or access to a service by chat and you don't want to be pointing another mobile phone at your screen.
Use Google Lens in Chrome to read QR codes from images
Google Lens is also integrated into Google Chrome, allowing you to Scan QR codes that appear in web images or that you have on your device.:
- Open the browser Google Chrome on your mobile.
- Play the Google Lens icon (It usually appears in the search bar or next to the images).
- Find the QR code image you want to scan and open it, either from the gallery or from a web page.
- Let Lens recognize the code and, when it displays the result, Click on the link or suggested action.
This method is especially useful if you're browsing the internet and you come across a QR code embedded in an image, banner, or document that you want to check without having to take pictures of the screen.
Scan QR codes with third-party apps
Although nowadays almost all modern mobile phones can scan QR codes with the camera or Lens, in some cases you might be interested in a dedicated scanner appespecially on older phones or when you need advanced features.
To use a third-party scanner On Android or iOS you can do the following:
- Open the Google Play Store or the App Store of your device.
- Seeks "QR code scanner“or “QR code scanner”.
- Choose an app with good reviews, clear privacy and security policies.
- Install it and, when you open it, Grant camera permissions and, if necessary, access to photos.
- If the app allows reading from the gallery, select the option to “scan from image” and choose the photo with the QR code.
- Wait for the application to interpret the code and you display the link or the corresponding text.
On iPhone, simple readers like "QR Code Reader" or "Scan" are usually recommended, while on Android there are alternatives like "QR Code Scanner", "Barcode Scanner" or more complete apps like Scanbotor consult the Best Android apps for reading QR codes.
Check if your Android phone scans QR codes with the default camera
Many current Android phones already include, within their own Camera app, a mode that automatically recognizes QR codes without using Google Lens separately. To check:
- Open the Camera app from your Android device.
- Play the settings icon (usually a gear in a corner).
- Look among the options for one related to “Scan QR codes”, “QR Code” or “Google Lens”.
- If it exists, make sure the box is checked or the switch is turned on.
- Try pointing your camera at a QR code and wait for it to appear. a notification or link onscreen.
If the phone recognizes it and shows you a warning, it means that You don't need to install anything extra to scan codesSimply opening the camera will be sufficient in most situations.
Scan QR codes from another screen (computer, tablet, another mobile phone)
It is also very common for the QR code to be in the screen of a laptop, desktop computer, tablet, or even another mobile phoneThe process is virtually the same as scanning a printed code, and if you need specific options for doing so, you can consult how. read QR code with PC.
Read the code with your mobile phone's camera
To scan a QR code that is on another screen, follow these basic steps:
- Open the Camera app or Google Lens on your phone.
- Point it at the QR code displayed on the monitor, tablet, or other smartphone.
- Make sure the code It is now centered at an appropriate distance. so that the focus is sharp.
- Keep your phone still until the notification with the link or content.
If you use Chrome or a reader app, the behavior will be the same: The browser, payment app, or associated content will open. to the code that appears on the screen.
Common problems when scanning from the screen and how to solve them
When a QR code is on a screen (especially a computer screen), it's easier to find minor reading problemsBut most are corrected quickly:
- Reflections and shinesIf the screen is reflecting light or is too bright, the phone may have difficulty capturing the code pattern correctly. Try lowering the monitor's brightness slightly. change the scanning angle to avoid reflections.
- Size and resolutionIf the QR code appears too small or in low resolution, it may be difficult to read. Enlarge the browser window. zoom in on the page Or make the image bigger so the mobile phone can detect it better.
- Focusing problemsIf the camera doesn't focus, move slightly closer or further away and use the zoom function. tap to focus in the area of the code. Make sure the QR code is not crooked or distorted in the viewer.
By applying these adjustments, scanning codes on other people's screens usually becomes a a quick and straightforward task.
Accessibility and posture recommendations when scanning
Regardless of whether you're on Android or iOS, there are some physical tips which help ensure the QR code is read correctly on the first try and is convenient for more people:
- Always use the rear camera of the devicewhich usually has a better focus and quality.
- Place the mobile phone at a distance where the QR code should occupy a good part of the screen but without going over the edge from the edges.
- Make light circular movements or small adjustments up/down and right/left if it is not detected instantly.
- If the person has low vision or motor difficulties, make sure that The code should be well contrasted, on a clean, non-reflective surface..
- When possible, use QR codes designed for accessibility (larger, with tactile markings or relief around), and if you want create your own QR codes You can customize them to make them easier to use.
With these simple guidelines, reading a QR code is usually a fairly quick and easy process, even for those who They are not very used to using mobile phones.
What happens after scanning a QR code and how to maintain security?
When you scan a QR code correctly, the mobile phone interprets the content and performs an action based on the type of information coded. Most often one of these things will happen:
- Open a websiteThe QR code contains a URL and the mobile phone launches the browser to load it.
- Start an appIf the code is associated with an application (for example, a payment application), scanning it will directly open that app if it is installed.
- Display text or an offerA promotion, coupon, instructions, or descriptive information may appear.
- Make or request a paymentSome QR codes are used to send money, pay bills, or donate to a cause.
In most cases it is safe, but you shouldn't forget that A QR code is essentially a link that you can't see at first glance.Therefore, it is advisable to take certain precautions.
- Avoid scanning codes of dubious origin or stuck on top of others (for example, suspicious stickers covering original QR codes).
- Before opening the website, Look at the URL that your mobile phone shows you.If the domain seems strange, has spelling mistakes, or is unrelated to the brand, it's best not to enter.
- In payment codes, always check that the banking app or payment gateway are official before confirming any amount.
- Try to use applications and services from reliable and well-known companiesespecially when the QR code involves sharing personal or financial data.
If you follow these basic recommendations, you will be able to Take advantage of all the benefits of QR codes without overexposing yourself to risks of phishing or malware.
With all these options available—Google Camera, Google Lens, built-in Android and iOS features, reading from the gallery, from screens, and help from third-party apps—reading a QR code becomes as routine as opening a website; you just need to be clear on how to do it. Where the code comes from, which tool you find most convenient on your mobile, and apply some basic security guidelines to get the most out of it in digital menus, payments, information on public spaces and any other day-to-day situation. Share this guide and more users will know how to use tools to read QR codes.