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
- I miei dati o immagini vengono caricati su un server?
- No. Tutti i calcoli e le esportazioni SVG/PNG avvengono al 100% in locale nel browser.
- I codici QR contengono reindirizzamenti o scadenze?
- No. Vengono codificati dati statici diretti senza domini intermedi e senza scadenza.
- Cosa succede se inserisco un logo centrale?
- Il livello di correzione errori passa automaticamente a Q o H per consentire la lettura nonostante l'ostacolo visivo.