Chances are you've seen a distinctive black-and-white square plastered somewhere on a menu, box, or subway station. These are QR codes. The initials stand for Quick Response, and these unmistakable square codes were designed to pack lots of information into an easy and fast-scanning format. They were invented in 1994, grew insanely popular, disappeared, and then made a comeback—mostly because you no longer need a dedicated app to use them. Nowadays, QR codes are used for everything from augmented reality advertisements to authenticating designer jeans, to sharing Wi-Fi passwords. More recently, QR codes are a crucial component of Covid-19 tracking programs in many countries, offering people a speedy way to check-in at different locations. They’re also increasingly employed in restaurants and retail stores as shortcuts to digital menus and order systems, and in some countries, you can pay with them without having to touch QR codes are very easy to use. Most smartphones have the ability to scan QR codes baked into the camera. We will show you how to do this, but we’ll also cover what to do if you have an older phone. Wait, do you need a phone first? Check out our guides to the Best Cheap Phones or our guide to how to factory-reset your old phone. If you buy something using links in our stories, we may earn a commission. This helps support our journalism. Learn You Have an iPhoneApple introduced QR code support in 2017. Every iPhone running iOS 11 or later can scan a QR code directly from the camera app. Here’s howOpen the camera the rear-facing camera in Photo the QR code you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.If You Have an Android PhoneGoogle introduced QR code support in 2018, so most, but not all, phones running Android 9 or later can scan QR codes from the camera app. Here’s howOpen the camera the rear-facing camera in Photo or Camera the QR code that you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.How to Scan with Google LensAnnoyingly, there’s no easy way to check whether your Android phone can scan QR codes from the camera app without trying it first. If your camera app doesn’t seem to work for you, Google Lens is a good alternative. Google's image-recognition technology can scan QR codes, among other things. It’s baked into Google Assistant, Google Photos, or the Google app on most Android phones, or you can also install the Google Lens app for free. Here’s how to use itTap the color lens icon in Google Assistant, or open the Google Lens the Search the QR code that you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.Use a QR Code Scanning AppUnfortunately, Google Lens mysteriously doesn’t work on certain phones, but don’t worry, there is another way. If both the camera app and Google Lens fail to work for your Android phone, it may be time to try a third-party QR code scanner app. There are tons of them in the Play Store, but most are filled with ads and demand a suspiciously long list of permissions. We recommend the open-source app QR Code No Ads because it only requires permission to access your camera and it’s ad-free. Here’s how to use itOpen the QR Code No Ads sure the QR code is inside the green corners of the highlighted box and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.Scan a QR code with ChromeSometimes the QR code you want to scan is on a website on your phone screen. Google has added Google Lens functionality into the Chrome browser, and you can use it on an Android phone or iPhone with these stepsTap and hold on the QR code menu should pop up. Select Search With Google the notification that pops up to open the link. You will need to be connected to the internet to do this.More Great WIRED Stories📩 The latest on tech, science, and more Get our newsletters!A people's history of Black TwitterScientists just looked’ inside Mars. Here's what they foundThis tool calls out thousands of hackable websitesIntel's ambitious plan to regain chipmaking leadershipPower up anywhere with the best travel adapters👁️ Explore AI like never before with our new database🎮 WIRED Games Get the latest tips, reviews, and more🏃🏽‍♀️ Want the best tools to get healthy? Check out our Gear team’s picks for the best fitness trackers, running gear including shoes and socks, and best headphones

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