QR Code Generator
Create QR codes for URLs, text, WiFi credentials, and email. Download as PNG in multiple sizes.
How to Use the QR Code Generator
- Select content type -- Choose URL, Text, WiFi, or Email from the tabs.
- Enter your data -- Fill in the required fields for your chosen content type.
- Choose size -- Pick Small (200px), Medium (300px), or Large (400px).
- Generate -- Click the Generate button to create your QR code.
- Download -- Click "Download PNG" to save the QR code image to your device.
About QR Codes
QR (Quick Response) codes were invented in 1994 by Denso Wave for tracking automotive parts. Today they are used worldwide for contactless payments, restaurant menus, event tickets, WiFi sharing, and linking to websites. A QR code stores data in a two-dimensional grid of black and white squares that can be read by any smartphone camera.
This generator creates QR codes entirely in your browser using JavaScript and the HTML5 Canvas API. No data is sent to any server. The generated codes follow the QR code standard and include error correction, making them readable even if partially damaged. You can encode URLs, plain text, WiFi network credentials, or pre-composed emails.
Use Cases for QR Codes
QR codes have become an essential part of everyday life, bridging the physical and digital worlds. Here are the most common applications.
Business Cards and Networking
Add a QR code to your business card that links to your website, LinkedIn profile, or digital vCard. Recipients can scan the code instead of manually typing your contact information, reducing errors and making follow-up effortless.
Restaurant Menus and Retail
Since 2020, contactless QR code menus have become standard in restaurants worldwide. A single QR code linking to a digital menu saves printing costs, allows instant updates, and reduces physical contact. Retailers use QR codes on product displays to link to reviews, specifications, or purchase pages.
Event Tickets and Check-In
Concert venues, conferences, and airlines use QR codes on tickets and boarding passes. Each code contains a unique identifier that is scanned at entry for fast, paperless verification. This approach is more efficient than printed barcodes and harder to counterfeit.
Wi-Fi Network Sharing
Generate a QR code with your Wi-Fi credentials and display it in your home, office, or rental property. Guests scan the code with their phone camera to connect instantly -- no need to spell out a complex password. This is especially useful for Airbnb hosts and co-working spaces.
Marketing and Advertising
Place QR codes on flyers, posters, product packaging, or direct mail to drive traffic to landing pages, app downloads, or promotional offers. Unlike printed URLs, QR codes are scannable in seconds and can track engagement when linked to analytics-enabled short URLs.
Payments and Invoicing
Mobile payment systems like Venmo, PayPal, and various banking apps use QR codes for peer-to-peer transfers. Businesses display payment QR codes at checkout counters, and invoices include QR codes that pre-fill payment details when scanned.
QR Code Data Capacity
QR codes come in 40 versions (sizes), with higher versions supporting more data. The table below shows approximate maximum capacities at error correction level L (7% recovery).
| Data Type | Max Characters (Version 40-L) | Practical Limit |
|---|---|---|
| Numeric (0-9) | 7,089 | ~300 |
| Alphanumeric (A-Z, 0-9, symbols) | 4,296 | ~200 |
| Binary / Byte | 2,953 | ~150 |
| Kanji | 1,817 | ~90 |
The "practical limit" column reflects the amount of data that can be encoded while keeping the QR code small enough to scan reliably at common print sizes (2-3 cm). For URLs and short text, staying under 150 characters ensures the code remains compact and scannable even at lower resolutions or when printed small.
Security Considerations
While QR codes are convenient, they can also be used maliciously. Never scan a QR code from an untrusted source without verifying the destination. Attackers sometimes place fraudulent QR code stickers over legitimate ones on parking meters, restaurant menus, or public posters to redirect users to phishing sites or malware downloads. This technique is known as "quishing" (QR phishing).
When scanning a QR code, most smartphone cameras display a preview of the URL before navigating. Always check that the domain looks correct and uses HTTPS before tapping the link. Be especially cautious with QR codes that trigger app installations, payment requests, or login prompts.
When creating QR codes for your own use, this tool processes everything in your browser -- no data is sent to a server, so your Wi-Fi passwords and other sensitive information remain private. For business use, consider using a URL shortener with analytics to track how many times your QR code is scanned.
Frequently Asked Questions
A QR (Quick Response) code is a two-dimensional barcode that stores data such as URLs, text, or contact information. It can be scanned by smartphone cameras and QR reader apps to instantly access the encoded information.
This generator supports URLs, plain text, WiFi network credentials (SSID, password, encryption type), and email messages with subject and body. Essentially any text data can be encoded.
Yes. Click the "Download PNG" button to save the generated QR code as a PNG image file. You can choose from three sizes before generating.
No. QR codes are simply encoded data and do not expire. However, if the QR code contains a URL, the destination website could change or become unavailable over time.
QR codes include redundant data that allows them to be read even if partially damaged or obscured. There are four error correction levels: L (recovers 7% of data), M (15%), Q (25%), and H (30%). Higher levels increase reliability but reduce the maximum data capacity of the code.
At maximum capacity (version 40), a QR code can store up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data. For practical use, keeping content under 150 characters ensures the code remains compact and easy to scan at common print sizes.
Yes. Use the WiFi tab to enter your network name (SSID), password, and encryption type (WPA/WPA2, WEP, or none). The generated QR code follows the standard WIFI: format and can be scanned by most smartphones to connect automatically without typing the password.
Yes. The QR code is generated entirely in your browser using JavaScript and the HTML5 Canvas API. No data is transmitted to any server. Your URLs, Wi-Fi passwords, and other content remain completely private on your device.