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QR Code & Barcode Guides

Practical guides for creating, scanning, reading, designing, printing, and troubleshooting QR codes and barcode formats.

Layered paper anatomy of a matrix code with corner targets and a scanning frame

Featured guide

What Is a QR Code and How Does It Work?

Learn what QR code means, how QR codes store data and error correction, how scanners read them, and how the symbol differs from its URL or destination.

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Technical paper study of code samples at three sizes and scanning distances

QR Code Size Guide for Print and Scanning Distance

Choose the right QR code dimensions and minimum print size using scan distance, module density, quiet zone, DPI, material and final-production testing.

Jul 22, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team
Technical paper illustration of a high-contrast matrix with protected corners and quiet space

How to Make a QR Code Scannable: Design Best Practices

Learn QR code design best practices for reliable scanning, including size, contrast, quiet zones, finder patterns, logo placement, color and print testing.

Jul 20, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team
Person using an unbranded smartphone to scan an abstract code card at a cafe table

How to Scan a QR Code on Android

Scan and read QR codes on Android with the camera, Quick Settings, Google Lens, a saved screenshot or an online QR code reader, with troubleshooting steps.

Jul 18, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team
Person scanning an abstract code card beside a laptop and printed image

How to Scan a QR Code on a Phone, Screenshot, or Laptop

Learn how to scan, read and decode a QR code with a phone camera, from an image or screenshot, or on a laptop, plus safety and troubleshooting steps.

Jul 16, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team
Paper workflow showing content, generation, design, scan testing, and final output

How to Create a QR Code Free Online

Learn how to create and make a free QR code online for a URL or structured payload, customize it safely, download PNG or SVG and test the final code.

Jul 14, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team
Layered paper anatomy of a matrix code with corner targets and a scanning frame

What Is a QR Code and How Does It Work?

Learn what QR code means, how QR codes store data and error correction, how scanners read them, and how the symbol differs from its URL or destination.

Jul 12, 2026QRBarcode Editorial Team portraitQRBarcode Editorial Team