Specifications & Print Guide — Engineering Standards & Privacy Manifesto
Comprehensive documentation covering ISO/IEC 18004 compliance, optical DPI formulas, optimal Reed-Solomon error correction, and zero-telemetry architecture.
The Privacy Manifesto
QR Studio was engineered with a strict principle: your data belongs exclusively to you. Every QR code generated on this platform is calculated within client-side memory using JavaScript and WebAssembly.
No URLs, passwords, contact cards, or geographic coordinates ever touch our servers. There are no tracking cookies, no surveillance analytics, and no third-party telemetry.
Reed-Solomon Error Correction (ECC)
Error correction allows QR codes to be successfully read even if partially obscured, soiled, or damaged. Use Level H (30%) when embedding central logos, and Level M (15%) for dense text data.
Produces the smallest, least dense grid. Recommended for lengthy plain text or dense data where no logo is used.
The industry standard for clean website URLs and digital displays. Offers optimal balance between density and reliability.
Recommended for industrial environments, curved surfaces (bottles, cans), or outdoor posters subject to weathering.
Mandatory when embedding a logo in the center of the QR code. QR Studio automatically switches to Level H when a logo is attached.
Print Resolution & DPI Standards
For professional offset and digital print, always export vector SVG. When raster PNG is required, generate at 300 DPI or higher using the 4096px export setting to ensure crisp scanning under varying lighting.
1. Minimum Physical Size: For close-up scanning (e.g. business cards, flyers), never print smaller than 2cm × 2cm (0.8" × 0.8").
2. Scanning Distance Ratio (10:1): As a rule of thumb, the ratio of scanning distance to QR code size should be roughly 10:1. For a billboard scanned from 10 meters away, the QR code should measure at least 1 meter wide.
3. The Quiet Zone: Always preserve at least 4 modules (or 8–16px) of blank margin around the perimeter of the QR code.
Built by Systems Architects & Cryptography Engineers
QR Studio is developed and maintained by a dedicated engineering group focused on browser-native cryptography and open barcode standards.
A zero-knowledge execution guarantee is an architectural privacy commitment ensuring that 100% of cryptographic calculations, Reed-Solomon polynomial error encoding, and vector rendering execute exclusively within local browser memory. When generating sensitive QR codes—such as private WPA3 Wi-Fi passwords, personal vCard 3.0 phone numbers, or confidential business links—0 bytes of payload data are ever transmitted to any external server or analytics database. In practice, our technical architecture enforces three verifiable security controls: 1. Zero Server-Side Logging: QR Studio operates as a static client application without backend databases, eliminating risks of data breaches and credential harvesting. 2. Direct Offline Encoding: Barcodes encode raw data directly into ISO/IEC 18004 matrix modules rather than routing through third-party URL shorteners that can be hijacked or tracked. 3. Complete Data Sovereignty: All SVG vectors and 4096px PNG files are synthesized locally on your CPU, ensuring full enterprise compliance with GDPR and CCPA mandates.
Official Barcode & Web Standards
QR Studio’s mathematical and optical engines are built in strict accordance with peer-reviewed international standards:
- 1.ISO/IEC 18004:2015: Information technology — Automatic identification and data capture techniques — QR Code bar code symbology specification (International Organization for Standardization).
- 2.RFC 2426 & RFC 6350: vCard MIME Directory Profile & Electronic Business Card format specifications (Internet Engineering Task Force).
- 3.Denso Wave Open Patent Standards: Free-to-use specifications standardized globally for non-proprietary optical identification (Denso Wave Inc., 1994).
- 4.W3C Web Application Security: Client-side cryptographic isolation and Content Security Policy guidelines.
How QR Studio Compares to Other Solutions
Clear technical comparison between decentralized browser generation, general graphic tools, and subscription redirect services.
| Feature / Capability | QR Studio | Canva QR Tool | Commercial Generators |
|---|---|---|---|
| Pricing & Cost | 100% Free Forever | Freemium (Account required) | $10–$50/mo after trial |
| Account Required | No (0 Sign-up) | Yes | Yes |
| Data Privacy | 100% Client-Side (0 bytes sent) | Cloud saved to profile | Database tracked & logged |
| Code Expiration | Never (Permanent Static) | Permanent | Expires if subscription lapses |
| Vector SVG Export | Native Vector SVG | Not available free | Paid tier only |
| Max PNG Resolution | 4096px Ultra-HD (300+ DPI) | Standard screen resolution | Restricted by plan |
| Bulk CSV Generation | Free CSV to ZIP Export | No | Enterprise tiers only |