QR Code Generator
Generate customizable QR codes for URLs, text, WiFi, and more. Download in PNG or SVG format.
How to Use the QR Code Generator
- Select the type of QR code you want to create (URL, text, WiFi, email, etc.).
- Enter the content for your QR code in the input field.
- Customize the appearance: colors, size, and error correction level.
- Preview the generated QR code in real time.
- Download the QR code as PNG or SVG for use in print or digital media.
What are QR Codes and How Do They Work?
QR (Quick Response) codes are two-dimensional barcodes that encode data in a grid of black and white squares. Developed by Denso Wave in 1994, QR codes can store up to 7,089 numeric characters or 4,296 alphanumeric characters. They use Reed-Solomon error correction, which allows a QR code to be readable even if up to 30% of the code is damaged or obscured, depending on the error correction level selected (L, M, Q, or H). QR codes are used extensively for sharing URLs, Wi-Fi credentials, contact information (vCard), authentication (TOTP setup), payment systems, boarding passes, and inventory management. The data is encoded using a specific format for each type: URLs are plain text, WiFi credentials use the WIFI:S:ssid;T:security;P:password;; format, and authentication tokens follow the otpauth:// URI scheme. From a security perspective, QR codes can be vectors for phishing attacks. Malicious QR codes can redirect users to phishing sites, trigger automatic downloads, or initiate actions like phone calls. This is sometimes called 'quishing' (QR phishing). Always verify the URL encoded in a QR code before visiting it, especially for codes found in public places where they could have been replaced with malicious ones. This tool generates QR codes locally in your browser without sending your data to any server.
Frequently Asked Questions
QR codes offer four error correction levels: L (7% recovery), M (15%), Q (25%), and H (30%). Higher levels make the code more resilient to damage but increase its size. Use L for clean digital displays, M for general purpose, Q for labels that may get scuffed, and H when you want to overlay a logo on the QR code.
Yes. Attackers can create QR codes that redirect to phishing sites, and this technique is known as 'quishing.' Malicious codes can be placed over legitimate ones in public spaces. Always check the decoded URL before visiting it, use a QR scanner that previews the URL, and be cautious of QR codes in unsolicited emails or public locations.
The maximum capacity depends on the data type and error correction level. At the lowest error correction (L), a QR code can store up to 7,089 numeric digits, 4,296 alphanumeric characters, or 2,953 bytes of binary data. Higher error correction reduces capacity. For practical use, keep URLs and text under 300 characters for reliable scanning.