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.
