QR Code Generator
Generate QR codes for text, URLs, WiFi credentials, emails, phone numbers, and vCards. Customize and download instantly.
What is a QR Code?
A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of black and white squares. QR codes can encode URLs, WiFi credentials, contact cards, email addresses, and plain text. This generator implements the full QR encoding standard including Reed-Solomon error correction, 8 mask patterns with penalty scoring, and versions 1-10.
Common Use Cases
- •Creating QR codes for website URLs and marketing materials
- •Generating WiFi QR codes for easy network sharing
- •Creating vCard QR codes for business cards
- •Encoding email addresses or phone numbers
- •Adding QR codes to print materials and presentations
Frequently Asked Questions
How much data can a QR code store?
A QR code can store up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data (Version 40 with low error correction). For practical use, keeping data under 300 characters ensures reliable scanning.
What is Reed-Solomon error correction?
Reed-Solomon is an algorithm that adds redundant data to the QR code so it can still be read even if part of it is damaged or obscured. QR codes offer four error correction levels: L (7%), M (15%), Q (25%), and H (30%).