Generate customizable QR codes instantly. Supports URLs, text, WiFi, vCards, email, phone, SMS, and more — with colors, sizes, and error correction options.
8 characters encoded
Encoded Data:
https://
QR codes (Quick Response codes) are two-dimensional barcodes that can store various types of data — URLs, text, contact information, WiFi credentials, and more. Invented in 1994 by Denso Wave for the automotive industry, QR codes have become ubiquitous in marketing, payments, authentication, and everyday communication.
Unlike traditional barcodes that store data in one dimension, QR codes use a matrix of black and white squares arranged in a grid pattern, allowing them to store significantly more information — up to 4,296 alphanumeric characters or 7,089 numeric digits.
QR codes include built-in error correction using Reed-Solomon algorithms, which means they can still be scanned even when partially damaged or obscured. The four error correction levels are: L (7% recovery), M (15%), Q (25%), and H (30%). Higher error correction allows for more damage tolerance but reduces data capacity.
Common applications include website URLs (the most popular use), WiFi network sharing (auto-connect without typing passwords), digital business cards (vCard format), payment links, event tickets, restaurant menus, app download links, and two-factor authentication.
For best results, ensure adequate contrast between the QR code and its background, maintain a quiet zone (white border) around the code, and test scanning with multiple devices before printing or publishing.