About the QR Code Generator

QR (Quick Response) codes store data in a 2D matrix of black and white squares. They can encode URLs, contact details, WiFi credentials, SMS messages, and plain text. A smartphone camera can scan them in under a second. QR codes use Reed-Solomon error correction, meaning up to 30% of the code can be damaged or obscured and it will still scan correctly — which is why placing a logo in the centre does not prevent scanning.

QR error correction levels

L (7% recovery) — smallest, most compact code. Use where the code will be printed cleanly with no damage risk.
M (15% recovery) — good balance for most applications.
Q (25% recovery) — recommended for print materials that may wear.
H (30% recovery) — required for logo overlays. Produces a larger, more complex code.

Best practices for print QR codes

Minimum recommended print size is 2.5 x 2.5 cm. Always maintain high contrast (dark code on light background). Add a clear call-to-action below the code ("Scan to book", "Scan for WiFi") — bare QR codes have significantly lower scan rates than labelled ones. Always test by scanning before printing large quantities.

QR codes for offline marketing

QR codes bridge print and digital marketing by giving print materials a direct link to digital content. They are most effective when they lead to a mobile-optimised landing page relevant to the context in which the code appears. A QR code on a business card should link to a contact page or vCard; one on a restaurant menu should link to the digital menu or booking page.

Business cards — link to LinkedIn, a portfolio, or a vCard for contact saving
Restaurant menus — link to the digital menu, booking system, or allergen information
Product packaging — link to instructions, sustainability info, or a loyalty programme
Event posters — link to ticket booking, event details, or a registration form

Frequently Asked Questions

What content types can I encode in a QR code?

This generator supports: URLs, plain text, email (with pre-filled to/subject/body), phone numbers, SMS with pre-filled message, WiFi credentials (network name, password, security type), vCard contact cards for saving to phone, and WhatsApp links with pre-filled messages.

What is the difference between static and dynamic QR codes?

A static QR code encodes the destination directly — the URL or data is fixed and cannot be changed after generation. A dynamic QR code encodes a short redirect URL; the destination can be updated without reprinting. Dynamic codes also support scan tracking but require a paid third-party service. All codes generated here are static.

Why does placing a logo in a QR code still allow scanning?

QR codes build in redundant error correction. At level H, up to 30% of the code can be obscured and still decoded successfully. A logo covering the centre uses roughly 20-22% of the code area, staying within this tolerance. Always test scan after adding a logo.

What is the minimum print size for a QR code?

The minimum recommended size is 2.5 x 2.5 cm (about 1 x 1 inch) for scanning at typical arm's length. For large-format printing such as posters or banners, scale up proportionally so the code can be scanned from further away.

How do I create a QR code for WiFi?

Select the WiFi type, enter your network name (SSID) and password, choose your security type (WPA2 for most home routers), and generate. Guests scan the code to connect automatically without typing credentials. WPA2/WPA3 is the correct type for virtually all modern routers.