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How to Generate QR Codes
QR codes are used everywhere — from restaurant menus and product packaging to business cards and event tickets. This generator creates high-quality QR codes that can be scanned by any smartphone camera, making it easy to share links, contact details, and text.
How to Use This Generator
- Select the input type — URL, Text, Email, or Phone — from the dropdown menu.
- Enter your content in the input field. For URLs, include the https:// prefix. For email, enter just the address. For phone, include the country code.
- Choose your QR code size from the size dropdown. Larger sizes are better for print materials.
- Download the QR code by clicking the Download PNG button. The image will be saved at your selected size.
How It Works
The generator uses the qrcode.js library to create QR codes entirely in your browser. When you enter text, the library converts it into a matrix of black and white modules following the QR code specification (ISO 18004). For email input, the generator prepends the mailto: protocol, and for phone numbers it adds the tel: protocol, enabling one-tap actions on mobile devices. The QR code is rendered onto an HTML canvas element, which can then be exported as a PNG image. No data is sent to any server — everything happens locally on your device.
Frequently Asked Questions
What is a QR code?
A QR (Quick Response) code is a two-dimensional barcode that stores data such as URLs, text, email addresses, or phone numbers. It can be scanned by smartphone cameras and QR reader apps to quickly access the encoded information.
How do I scan a QR code?
Most modern smartphones can scan QR codes directly through their camera app. Open your camera, point it at the QR code, and a notification or link will appear. Some older devices may require a dedicated QR scanner app from the app store.
What size should my QR code be?
The minimum recommended size is 2 x 2 cm for close-range scanning (such as business cards). For posters or signs, use at least 10 x 10 cm. The rule of thumb is that the QR code should be at least one-tenth the scanning distance.
Can QR codes store any type of data?
QR codes can store text, URLs, email addresses, phone numbers, Wi-Fi credentials, and more. The maximum data capacity is about 3,000 alphanumeric characters, though simpler content produces cleaner, more easily scanned codes.
Do QR codes expire?
Static QR codes like those generated here never expire. The data is encoded directly in the pattern and will work as long as the QR code image exists. Dynamic QR codes created by some services can expire if the hosting service is discontinued.
How do I download the QR code?
Click the Download PNG button below the QR code preview. The image will be saved to your device at your selected size. You can then use it in documents, print materials, or share it digitally.
Are QR codes free to create?
Yes, our QR code generator is completely free to use with no limits on the number of codes you can create. QR codes themselves are an open standard maintained by ISO, so there are no licensing fees or royalties involved. You can generate, download, and use as many QR codes as you need for both personal and commercial purposes.
Do QR codes expire?
Static QR codes like the ones created by our generator never expire because the data is encoded directly into the pattern of black and white modules. As long as the image file exists and remains undamaged, it will continue to scan correctly indefinitely. Dynamic QR codes, which redirect through a third-party service, can expire if that service shuts down or the subscription lapses.
How much data can a QR code hold?
A single QR code can store up to 4,296 alphanumeric characters or 7,089 numeric digits at maximum capacity. However, the more data you encode, the denser and more complex the pattern becomes, making it harder for cameras to scan reliably. For best results, keep URLs short and content concise to produce a clean, easily scannable code.
Can I put a logo in a QR code?
QR codes have built-in error correction that allows up to 30% of the pattern to be obscured or damaged while still scanning correctly. Professional design tools take advantage of this by overlaying a small logo in the centre of the code. Our generator creates standard QR codes without logo overlays, ensuring maximum scan reliability.
What is the difference between static and dynamic QR codes?
Static QR codes encode the destination data directly into the pattern, meaning the content cannot be changed after the code is created. Dynamic QR codes redirect through a URL shortener or tracking service, allowing you to change the destination link, track scan analytics, and update content without reprinting the code. Our tool creates static codes, which are simpler, more reliable, and do not depend on any external service.
Can QR codes be scanned from a screen?
Yes, modern smartphone cameras can scan QR codes displayed on computer monitors, tablet screens, phone screens, and even projectors. For the best scanning experience, ensure there is good contrast between the dark modules and the light background. Avoid glare, reflections, and very low screen brightness, which can interfere with the camera's ability to read the code.
Are QR codes secure?
QR codes themselves are not inherently dangerous — they are simply a way to encode data in a visual pattern. However, a QR code can link to a malicious website or trigger an unwanted action, so you should always check the URL before visiting it. Our generator only creates codes from the input you provide, and no data is sent to any server.
What size should a QR code be for print?
For close-range scanning such as business cards or product labels, a minimum size of 2 cm x 2 cm is recommended. For posters, banners, or signage that will be viewed from a distance, scale the code up proportionally — a good rule of thumb is that the code should be at least one-tenth of the expected scanning distance. Always include a quiet zone (white border) of at least four modules around the code to help scanners identify its edges.
What Is a QR Code and How Does It Work?
QR codes — short for Quick Response codes — were invented in 1994 by Denso Wave, a subsidiary of Toyota, to track automotive parts during manufacturing. Unlike traditional barcodes which store data in a single horizontal line, QR codes store information in a two-dimensional matrix of black and white squares, allowing them to hold significantly more data. A standard QR code can store up to 4,296 alphanumeric characters, making them capable of encoding URLs, contact details, WiFi credentials, and even short paragraphs of text. When you point a camera at a QR code, the device's software identifies the three distinctive square finder patterns in the corners, determines the code's orientation, and then reads the data encoded in the pattern of modules.
Types of QR Codes
QR codes can encode several different types of data, each triggering a different action when scanned. URL codes are the most common, opening a website directly in the scanner's browser. Text codes display plain text on screen. Email codes open a pre-addressed email with optional subject and body text. Phone codes initiate a phone call to a specified number. SMS codes open a text message to a given number. WiFi codes allow devices to connect to a wireless network without manually typing the password — particularly useful in hotels, cafes, and offices. vCard codes save a full contact card including name, phone, email, and address directly to the scanner's address book.
How to Scan a QR Code
On iPhone, simply open the Camera app and point it at the QR code — a notification banner will appear at the top of the screen with the encoded link or action. Tap it to proceed. On Android, most modern devices also scan QR codes through the default Camera app, though some older models may require Google Lens or a dedicated QR scanner app from the Play Store. For scanning codes displayed on your own phone screen, you can use the built-in QR scanner in your device's control centre or notification shade.
Best Practices for QR Codes
To ensure your QR codes scan reliably, follow these guidelines. Maintain a minimum print size of 2 cm x 2 cm for codes that will be scanned at close range, and scale up for posters or signage viewed from a distance. Always use high contrast — dark modules on a light background work best, and avoid placing codes on busy or patterned backgrounds. Leave a quiet zone (white border) of at least four modules around the code to help scanners identify its edges. Always test your QR code on multiple devices before printing or publishing. If linking to a website, ensure the destination page is mobile-friendly, since most QR code scans happen on phones.
Where Are QR Codes Used?
QR codes have become ubiquitous across industries. Restaurants use them for digital menus, reducing printing costs and allowing instant updates. Business cards include QR codes linking to LinkedIn profiles or portfolios. Product packaging uses them for nutritional information, assembly instructions, or authenticity verification. Event organisers issue QR code tickets for fast entry scanning. Payment systems like Apple Pay, Google Pay, and bank apps use QR codes for contactless transactions. Marketing campaigns place them on posters, flyers, and advertisements to drive traffic to landing pages. They also appear on museum exhibits, airline boarding passes, loyalty programme cards, and government documents.
