Technical

Understand QR code versions, what determines version selection, and how version affects size, capacity, and scannability of your QR codes.

Learn about QR code security risks including quishing, malware, and phishing attacks. Discover best practices for both creating and scanning QR codes safely.

Learn how to use QR code APIs to generate codes programmatically. Covers authentication, endpoints, parameters, and integration patterns for developers.

Understand the differences between PNG, SVG, and PDF for QR codes. Learn which format to choose for print, web, and different use cases.

Learn about QR code quiet zones—the essential white space that makes codes scannable. Understand specifications, common mistakes, and how to ensure reliable scanning.

Understand the four QR code encoding modes—numeric, alphanumeric, byte, and kanji—and how they affect data capacity and code size.

Learn which QR code metrics actually drive decisions. Understand scan data, conversion tracking, and how to measure ROI from your QR code campaigns.

Learn how to choose QR code colors that scan reliably. Understand contrast ratios, safe color combinations, and when custom colors work or fail.

Understand the differences between Micro QR codes and standard QR codes. Learn when smaller codes make sense and what tradeoffs they involve.

Learn how Structured Append mode lets you split large data across multiple QR codes that reassemble when scanned. Technical guide covering use cases, limitations, and alternatives.

Understand QR code ECI mode for encoding international characters, special symbols, and non-Latin text. Technical guide for developers working with multilingual QR codes.

Understand how Reed-Solomon error correction enables QR codes to remain scannable despite damage, dirt, or partial obstruction. Technical explanation for developers.

Learn how QR codes are generated algorithmically, from data encoding to module placement to masking. Technical guide for developers building QR code systems.

Set up webhook notifications for QR code scans. Learn about payload formats, HMAC signature verification, retry logic, and building real-time integrations.

Generate up to 100 QR codes per request with QRWolf's REST API. Authentication, endpoints, rate limits, and bulk creation patterns for developers.

Add a free QR code generator widget to any website with a single line of code — supports URL, text, WiFi, email, and phone types with full theme customization.

Understand GTINs — the numbers behind every barcode. Learn about GTIN-8, GTIN-12, GTIN-13, and GTIN-14 formats, check digit algorithms, and how GTINs work in GS1 Digital Link QR codes.

A practical reference for GS1 Application Identifiers used in Digital Link QR codes. Covers identification, traceability, measurement, and trade AIs with format rules and validation.