QR Code Generator

QR Code Guides and Best Practices

These guides explain the decisions behind a reliable QR code: how large it should be, which error correction level to use, how to handle Wi-Fi and payment codes safely, and how to print and test the result. They are written for the same static, privacy-first model used by every generator on this site.

All guides

  • QR Code Size and Viewing Distance GuideChoose a practical QR code size for business cards, labels, posters and signage. Includes minimum sizes, viewing-distance rules and print-proof advice.
  • QR Code Error Correction Levels ExplainedUnderstand L, M, Q and H error correction, how they affect QR code density, and when to use high error correction for logos or damaged surfaces.
  • Wi-Fi QR Code Security GuideUse Wi-Fi QR codes safely. Learn why guest networks matter, how passwords are exposed, and how to avoid common setup mistakes.
  • UPI QR Code Safety and Payment VerificationUse UPI QR codes responsibly. Learn how to verify payee details, avoid fraud, and understand what a static payment code can and cannot do.
  • Bulk QR Code Generation WorkflowPrepare CSV files for bulk QR code generation. Covers column mapping, validation, file naming, ZIP downloads and error reports.
  • Printing QR Codes ReliablyPractical printing advice for QR codes: scale, quiet zone, contrast, materials, glare, and proof testing before a production run.
  • QR Code Accessibility and ContrastMake QR codes easier to scan and use. Learn about contrast, colour choices, size, placement and accessible alternatives.
  • Static vs Dynamic QR CodesUnderstand the difference between static and dynamic QR codes, including privacy, editing, analytics, expiry and when each is appropriate.
  • PNG vs SVG for QR CodesChoose between PNG and SVG QR code downloads. Covers scaling, print workflows, editing, file size, and compatibility.
  • How to Test QR Codes Before PrintingA repeatable QR code testing method: device checks, lighting, print proofs, contrast, quiet zone, and failure diagnosis.
  • QR Code Examples by Use CasePractical QR code examples for menus, events, business cards, packaging, education, support and asset labels, with testing advice for each.
  • QR Code Maintenance and ReplacementManage QR codes after printing: stable URLs, replacement plans, signage checks, and safe handling of payment and Wi-Fi codes.