QR Code Generator

Create QR codes for URLs, text, and contact information.

About QR Codes

QR codes pack information into a pattern of black and white squares that cameras can read. They can hold URLs, plain text, contact cards (vCard), WiFi credentials, or any text up to about 3KB. The built-in error correction means codes work even when partially damaged or obscured.

Size matters for scanning distance. A 200x200 pixel code works fine on screens but might be hard to scan from a poster across the room. For print materials, generate larger sizes. The content complexity also affects minimum size - a long URL needs more squares than a short one.

Tips for Better QR Codes

  • Use URL shorteners for long links - shorter data means simpler codes
  • Test your code with multiple phones before printing
  • Leave white space (quiet zone) around the code
  • Black on white gives best contrast; avoid color combinations

Understanding QR Code Technology

QR (Quick Response) codes store data in a two-dimensional matrix of black and white squares. They can encode URLs, text, contact information, WiFi credentials, and more. Unlike traditional barcodes, QR codes are read in two dimensions, allowing much more data storage'up to 4,296 alphanumeric characters.

QR codes include error correction, meaning they can still be scanned even if partially damaged. Our generator uses the highest error correction level (H), which allows recovery even when 30% of the code is damaged'perfect for printed materials that might get scratched or worn.

Frequently Asked Questions

What size should I use for my QR code?

For print: minimum 2cm (0.8 inches) for good scanning. For digital screens: 100-200px works well. Larger QR codes scan more reliably, especially with longer encoded content. When in doubt, go bigger'smaller codes may not scan reliably.

Can I add a logo to the center?

Yes, but carefully. Error correction allows logos up to about 10-30% of the QR code area. However, this uses our basic generator. For branded QR codes with logos, use specialized tools that properly calculate error correction around the logo.

How much text can a QR code hold?

Maximum capacity is about 3,000 bytes or 4,296 alphanumeric characters. However, more data means a denser (harder to scan) code. For URLs, use URL shorteners if needed. Keep content concise for reliable scanning, especially on mobile devices.