QR Code generator
Generate QR codes from text or URLs
QR Code Generator
Generate a QR code from any text or URL
TL;DR
What is QR Code generator?
A QR code (Quick Response code) is a two-dimensional matrix barcode defined in ISO/IEC 18004 that encodes data as a pattern of black and white squares. Smartphone cameras can decode them instantly. QR codes can store URLs, plain text, contact cards (vCard), Wi-Fi credentials, or any other short string.
Common use cases
- ‣URL sharing: encode a link to share offline in print materials, posters, or presentations
- ‣Wi-Fi credentials: encode an SSID and password so guests can connect by scanning without typing
- ‣App deep links: link directly to a specific screen inside a mobile app
- ‣Event check-in: encode a ticket ID or attendee identifier for scanner-based validation
Frequently asked questions
How much data can a QR code hold?
A QR code can hold up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data. In practice, shorter data produces less dense QR codes that scan more reliably, especially in low-resolution print.
What is error correction in QR codes?
QR codes include redundant data so they can be decoded even if part of the code is obscured or damaged. There are four error correction levels: L (7% recovery), M (15%), Q (25%), and H (30%). Higher levels make the code larger but more resilient to damage.