How do QR codes work?

QR codes encode data in a 2D pattern scannable by cameras, with error correction for reliability.

Maximum QR code data?

Up to 4,296 alphanumeric characters. Keep URLs short for easier scanning.

Can I customize colors?

Yes. Change colors, add logos, adjust size. Maintain contrast for reliable scanning.

What size should I print a QR code for it to be scannable?

The minimum recommended print size is 2x2 cm (0.8x0.8 inches) for close-range scanning. For posters or signs viewed from a distance, follow the 10:1 ratio — 1 cm of QR code per 10 cm of scanning distance.

Can I add a logo to the center of a QR code?

Yes, if the QR code uses high error correction level (H = 30%). The logo can cover up to 30% of the code area. Lower error correction levels leave less room for logos before the code becomes unscannable.

QR Code Generator

Create QR codes for URLs, text, and more

Content

Size

Error Correction

What is a QR Code?

QR (Quick Response) codes are two-dimensional barcodes that can store various types of data including URLs, text, contact information, and more.

They can be scanned by smartphone cameras and QR code reader apps to quickly access the encoded information.

Error Correction Levels

Low (L): 7% recovery - Smallest QR code, best for clean environments.

Medium (M): 15% recovery - Good balance between size and reliability.

Quartile (Q): 25% recovery - Better reliability for printed codes.

High (H): 30% recovery - Maximum reliability, works even if partially damaged.

QR Code Generator

What is a QR Code?

Error Correction Levels

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