How Static QR Codes Work
QR (Quick Response) codes are two-dimensional optical barcodes that encode binary data into a grid of dark and light modules. Unlike dynamic QR codes that route through centralized tracking servers or expiring redirect services, static QR codes directly store the complete payload in the pattern itself.
Standard Static QR Payloads
- Plain Text & URL: Directly encodes alphanumeric text or canonical URLs that open immediately in camera and QR scanning apps without intermediaries.
- Wi-Fi Network (ZXing Protocol): Formats network credentials into a standard string allowing iOS and Android devices to join WPA/WEP networks instantly upon scan.
- vCard 3.0 Contact Card: Standard electronic business card payload with name, phone, organization, email, and website ready for one-tap address book import.
Optical Scan Reliability and Reed-Solomon Error Correction
QR codes employ Reed-Solomon algebraic error correction. With levels Q (25%) and H (30%), substantial portions of the matrix can be covered by a center brand logo or endure physical scratches while remaining completely decodable. Our generator evaluates contrast ratios and code density to alert you whenever scan reliability might be compromised.
Frequently Asked Questions
- 入力した個人情報や画像はサーバーに送信されますか？
- 一切送信されません。すべての計算、スタイリング、ロゴ合成、ファイル保存は100%端末のブラウザ内で完結します。
- 有効期限やリダイレクト追跡用の短縮URLは含まれますか？
- いいえ。完全な静的QRコードであり、外部サーバーを介さず永久に直接読み取り可能です。
- 中央にロゴを入れた場合の読み取り精度は？
- ロゴ挿入時は誤り訂正レベルが自動でQ（25%）またはH（30%）に引き上げられ、安全にスキャンできます。